INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS)
INFORMATION CIRCULAR No. 155 (FEBRUARY 2005)
NEW ORBITS
ADS Name P (yr) T e W(2000) 2005 Author
RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2006
---------------------------------------------------------------------------------------
434 STT 12 536.47 2012.09 0.816 17.4 201.2 0.281 LING
00318+5431 0.6711 1.165 75.8 260.5 2004.928 203.0 0.255 et al. (*)
873 HO 213 500. 1995.82 0.156 111.7 113.7 0.299 DOCOBO
01040+3528 0.7200 0.354 33.2 353.2 2001.8505 114.5 0.299 & LING
1769 A 1274 1282.73 1697.16 0.732 9.4 283.5 0.450 MANTE
02193+5338 0.2807 0.825 66.9 116.2 1991.25 283.8 0.451
3228 BU 1186 160.59 2005.80 0.740 5.4 0.7 0.105 OLEVIC &
04275+1113 2.2417 0.401 118.6 27.3 1996.869 348.9 0.093 CVETKOVIC
McA 16 Aa 46.81 2025.11 0.324 12.2 41.1 0.287 OLEVIC &
04422+2257 7.6913 0.249 132.3 126.8 1998.775 37.5 0.291 CVETKOVIC
4392 STT 118 AB 553.27 1797.06 0.062 136.7 312.9 0.078 OLEVIC &
05484+2052 0.6507 0.713 90.4 124.0 1991.25 312.5 0.070 CVETKOVIC
MLR 318 356.86 2160.55 0.577 128.7 308.7 1.555 OLEVIC &
06425+6612 1.0088 0.998 94.1 352.6 1995.19 308.7 1.553 CVETKOVIC
CHR 26 14.07 1984.65 0.208 1.3 320.9 0.056 MANTE
07269+2015 25.5900 0.067 57.9 135.0 1995.9215 336.7 0.067
7456 STF 1372 371. 1993.50 0.696 64.9 245.4 0.267 ALZNER
09371+1614 0.9704 0.645 80.4 113.4 2003.59 246.0 0.275
FIN 65 121.88 2063.64 0.561 68.1 107.1 0.222 MANTE
12446-5717 2.9537 0.295 109.1 109.7 1993.0930 105.7 0.227
8727 CHR 39 Aa 7.96 1995.79 0.392 46.2 298.1 0.071 MANTE
12597-0349 45.2261 0.077 6.1 149.7 1996.1840 335.1 0.092
HJ 4757 508.06 2048.97 0.259 40.5 5.1 0.769 LING
15234-5919 0.7086 1.009 150.0 91.2 1996.16 4.1 0.765 et al. (*)
9744 HU 580 21.98 2007.22 0.093 69.8 254.5 0.155 DOCOBO
15416+1941 16.3785 0.209 83.8 260.4 2000.5185 259.0 0.107 & LING
10374 BU 1118 AB 87.72 2024.81 0.947 39.0 238.5 0.574 DOCOBO
17104-1544 4.1040 1.384 95.3 274.9 2002.443 237.8 0.579 & LING
KUI 93 61.72 2023.11 0.966 153.8 314.6 0.183 DOCOBO
19411+1349 5.8328 0.129 65.4 314.7 2001.731 314.9 0.180 & LING
13964 STF 2695 269. 2016.37 0.431 77.4 251.3 0.330 ALZNER
20320+2548 1.3383 0.773 84.1 174.1 2004.16 251.9 0.344
16368 HU 785 266.82 2125.41 0.269 87.7 119.0 0.205 OLEVIC &
22550+5132 1.3492 0.285 109.8 108.6 1991.25 118.2 0.208 CVETKOVIC
16904 CHR 149 Aa 22.23 1999.03 0.228 63.8 93.4 0.042 OLEVIC &
23393+4543 16.1915 0.040 150.0 205.7 1999.821 81.5 0.045 CVETKOVIC
(*) LING, PRIETO and MAGDALENA
PAPERS PUBLISHED IN 2004
1. ABAD, C. et al.: "Reduction of CCD observations of visual binaries using the 'Tepui'
function as PSF", Astron. Astrophys. 416, (2), 811 (2004).
2. ABT, H.A. & BOONYARAK, C.: "Tidal Effects in Binaries of Various Periods",
Astrophys. J. 616, (1), 562 (2004).
3. ABT, H.A. & WILLMARTH, D.W.: "The Mass Distribution of Secondaries to Solar-Type
Stars", Rev. Mex. A. C. 21, 37 (2004).
4. AHMAD, A.; JEFFERY, C.S. & FULLERTON, A.W.: "Discovery of a spectroscopic binary
comprising two hot helium-rich subdwarfs", Astron. Astrophys. 418, (1), 275 (2004).
5. ALLEN, C. et al.: "Internal Motions of Trapezium Systems",
Rev. Mex. A. C. 21, 195 (2004).
6. ARGYLE, R.: "Observing and measuring visual double stars", Patrick Moore's practical
astronomy series. Berlin: Springer, (2004).
7. BALEGA, I. et al.: "Speckle interferometry of nearby multiple stars. II",
Astron. Astrophys. 422, (2), 627 (2004).
8. BECK, T.L. et al.: "A High Spatial Resolution Infrared View of the T Tauri Multiple
System", Astrophys. J. 614, (1), 235 (2004).
9. BEUZIT, J.-L. et al.: "New neighbours - III. 21 new companions to nearby dwarfs,
discovered with adaptive optics", Astron. Astrophys. 425, (3), 997 (2004).
10. BOUY, H. et al.: "First determination of the dynamical mass of a binary L dwarf",
Astron. Astrophys. 423, (1), 341 (2004).
11. BRANDNER, W. et al.: "Astrometric monitoring of the binary brown dwarf DENIS-P
J1228.2-1547", Astron. Astrophys. 428, (1), 205 (2004).
12. CARQUILLAT, J.-M. et al.: "Contribution to the search for binaries among Am stars
VI. Orbital elements of ten new spectroscopic binaries, implications on tidal
effects", Monthly Notices 352, (2), 708 (2004).
13. COURTOT, J.-F. & ARGYLE, R. W.: "Micrometric measures of double stars from 2003.0 to
2004.0", The Webb Soc. Double Star Section Cir. 12, 1 (2004).
14. DE BECKER, M.; RAUW, G. & MANFROID, J.: "A Spectroscopic study of the non-thermal
radio emitter Cyg OB2 #8A: Discovery of a new binary system",
Astron. Astrophys. 424, (3), 39L (2004).
15. DE DONDER, E. & VANBEVEREN, D.: "The influence of binaries on galactic chemical
evolution", New Astron. Rev. 48, 861 (2004).
16. DOCOBO, J.A. et al.: "Binary Star Speckle Interferometry: Measurements and Orbits",
Astron. J. 127, (2), 1181 (2004).
17. EDELMANN, H. et al.: "Radial velocity curves of nine sdB binary stars",
Astrophys. Space Science 291, (3), 315. (2004).
18. EGGENBERGER, A. et al.: "Statistical properties of an unbiased sample of F7-K
binaries: towards the long-period systems", Rev. Mex. A. C. 21, 28 (2004).
19. FEKEL, F.C.: "Increased Multiplicity of 77 Cygni, V815 Herculis, and HD 140122",
Rev. Mex. A. C. 21, 45 (2004).
20. FEKEL, F.C.: "The Spectroscopic Orbit of phi Cygni, a System with Two Late-Type
Giants, Rev. Mex. A. C. 21, 63 (2004).
21. FEKEL, F.C.: "Chromospherically Active Stars. XXIII. The Triple System HD 7205 =
QU Andromedae", Astron. J. 127, (5), 2931 (2004).
22. FEKEL, F.C. & TOMKIN, J.: "Spectroscopic orbits of potential interferometric
binaries", Astron. Nach. 325, (6-8), 649 (2004).
23. FEKEL, F.C.; HENRY, G.W. & ALSTON, F.M.: "Chromospherically Active Stars. XXII.
HD 18955, A Massive K Dwarf Binary", Astron. J. 127, (4), 2303 (2004).
24. FISHER, J.; SCHRODER, K.-P. & SMITH, R.C.: "Volume-limited Spectroscopic Binary
Statistics", Rev. Mex. A. C. 21, 65 (2004).
25. FISHER, R.T.: "A Turbulent Interstellar Medium Origin of the Binary Period
Distribution", Astrophys. J. 600, (2), 769 (2004).
26. FORS, O.; HORCH, E.P. & NUNEZ, J.: "Application of fast CCD drift scanning to
speckle imaging of binary stars", Astron. Astrophys. 420, (1), 397 (2004).
27. FORS, O. et al.: "Infrared and visual lunar occultations measurements of stellar
diameters and new binary stars detections at the Calar Alto 1.5 m telescope",
Astron. Astrophys. 419, (1), 285 (2004).
28. GRIFFIN, R.F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 174: HD 14914, HR 2599, and HD 221422", The Observatory 124, 22 (2004).
29. GRIFFIN, R.F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 175: BD +48.1048, HR 1736, HR3416, and HD 199378/9",
The Observatory 124, 97 (2004).
30. GRIFFIN, R.F.: "The Orbital Eccentricity of HDE 258878 (OW Gem)",
The Observatory 124, 136 (2004).
31. GRIFFIN, R.F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 176: HD 142353, HD 164025, HD165007, and HD 209746",
The Observatory 124, 190 (2004).
32. GRIFFIN, R.F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 177: 85 Pegasi", The Observatory 124, 258 (2004).
33. GRIFFIN, R.F.: "A Second Look at the Orbit of HR 6388",
The Observatory 124, 294 (2004).
34. GRIFFIN, R.F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 178: HD 109118, HD 112138, HD 112445, and HD 114941",
The Observatory 124, 371 (2004).
35. GRIFFIN, R.F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 179: HD 108547, HD 113093, HD 113393, and HD 113638",
The Observatory 124, 429 (2004).
36. HARTKOPF, W.I. & MASON, B.D.: "Addressing confusion in double star nomenclature: The
Washington Multiplicity Catalog", Rev. Mex. A. C. 21, 83 (2004).
37. HENRY, G.W.; FEKEL, F.C. & HENRY, S.M.: "HD 207651: A Triple System with delta Scuti
and Ellipsoidal Variations But No gamma Doradus Pulsations",
Astron. J. 127, (3), 1720 (2004).
38. HILLENBRAND, L.A. & WHITE, R.J.: "An Assessment of Dynamical Mass Constraints on
PreMain-Sequence Evolutionary Tracks", Astrophys. J. 604, (2), 741 (2004).
39. HORCH, E.P.; MEYER, R.D. & VAN ALTENA, W.F.: "Speckle Observations of Binary Stars
with the WIYN Telescope. IV. Differential Photometry",
Astron. J. 127, (3), 1727 (2004).
40. JIANG, I.-G. & YEH, L.-C.: "The Modified Restricted Three Body Problems",
Rev. Mex. A. C. 21, 152 (2004).
41. JORISSEN, A. et al.: "Spectroscopic Binaries among a Complete Sample of Hipparcos M
Giants", Rev. Mex. A. C. 21, 71 (2004).
42. KAISLER, D. et al.: "HD 199143 and HD 358623: Two recently identified members of the
beta Pictoris moving group", Astron. Astrophys. 414, (1), 175 (2004).
43. KARATA Y. et al.: "Kinematics of chromospherically active binaries and evidence of an
orbital period decrease in binary evolution", Monthly Notices 349, (3), 1069 (2004).
44. KAYE, A.B.; GRAY, R.O. & GRIFFIN, R.F.: "On the Spectroscopic Nature of HD 221866",
Pub. Astron. Soc. of the Pacific 116, (820), 558 (2004).
45. KONACKI, M. & LANE, B.F.: "The Visual Orbits of the Spectroscopic Binaries HD 6118
and HD 27483 from the Palomar Testbed Interferometer",
Astrophys. J. 610, (1), 443 (2004).
46. LAMPENS, P.; PRIEUR, J.-L. & ARGYLE, R.: "Infrared differential photometry of
selected orbital binaries", Rev. Mex. A. C. 21, 75 (2004).
47. LANE, B.F. & MUTERSPAUGH, M.W.: "Differential Astrometry of Subarcsecond Scale
Binaries at the Palomar Testbed Interferometer", Astrophys. J. 601, (2), 1129 (2004).
48. LEVATO, H. et al.: "Spectroscopic binaries in southern open clusters",
Rev. Mex. A. C. 21, 141 (2004).
49. LING, J.F.: "Preliminary Orbits for Eight Visual Binaries",
Astrophys. J. Suppl. Ser. 153, (2), 545. (2004).
50. LING, J.F.; MAGDALENA, P. & PRIETO, C.: "The Distribution of separations of DMSA
Hipparcos Catalogue", Rev. Mex. A. C. 21, 77 (2004).
51. LUHMAN, K.L.: "The First Discovery of a Wide Binary Brown Dwarf",
Astrophys. J. 614, (1), 398 (2004).
52. MASON, B.D. et al.: "Speckle Interferometry at the US Naval Observatory. IX",
Astron. J. 127, (1), 539 (2004).
53. MASON, B.D. et al.: "Speckle Interferometry at the US Naval Observatory. X",
Astron. J. 128, (6), 3012 (2004).
54. MONNIER, J. D. et al.: "First Results with the IOTA3 Imaging Interferometer: The
Spectroscopic Binaries Virginis and WR 140", Astrophys. J. Lett. 602, (1), L57 (2004).
55. NURMI, P.: "Observational Properties of Synthetic Visual Binary Catalog",
Rev. Mex. A. C. 21, 263 (2004).
56. PARSONS, S. B.: " New and Confirmed Triple Systems with Luminous Cool Primaries and
Hot Companions", Astron. J. 127, (5), 2915 (2004).
57. OLEVIC, D. & CVETKOVIC, Z.: "Orbits of 10 interferometric binary systems calculated
by using the improved Koval'skij method", Astron. Astrophys. 415, (1), 259 (2004).
58. PEREIRA, C. B. : "The nature of Hen 3-1312: A post-AGB star in a binary system",
Astron. Astrophys. 413, (3), 1009 (2004).
59. PEREZ, M. R. et al.: "A young and complex binary star - HD 144432",
Astron. Astrophys. 416, (2), 647 (2004).
60. POURBAIX, D. et al.: "Color-Induced Displacement double stars in SDSS",
Astron. Astrophys. 423, (2), 755 (2004).
61. POURBAIX, D.; JANCART, S. & BOFFIN, H.M.J.: "What can the SB9 database do for you?",
Rev. Mex. A. C. 21, 265 (2004).
62. POURBAIX, D. et al.: "SB9: The ninth catalogue of spectroscopic binary orbits",
Astron. Astrophys. 424, (2), 727 (2004).
63. POVEDA, A. & ALLEN, C.: "The distribution of separations of wide binaries of
different ages", Rev. Mex. A. C. 21, 49 (2004).
64. RAMM, D.J.; SKULJAN, J. & HEARNSHAW, J. B.: " The orbit of a new double-lined
spectroscopic binary: HD 161958", The Observatory 124, 167 (2004).
65. RAUW, G. & DE BECKER, M. : "Early-type stars in the young open cluster IC 1805. I.
The SB2 system BD+60 497 and the probably single stars BD+60 501 and BD+60 513",
Astron. Astrophys. 421, (2), 693 (2004).
66. RAUW, G. et al.: " WR 20a: A massive cornerstone binary system comprising two extreme
early-type stars", Astron. Astrophys. 420, (2), L15 (2004).
67. REIPURTH, B. & ASPIN, C.: "The FU Orionis Binary System and the Formation of Close
Binaries", Astrophys. J. Lett. 608, (1), L65 (2004).
68. RICHICHI, A.: "Interferometry and Lunar Occultations: Status and Prospects of
Ground-based Milliarcsecond Resolution Observations ", Rev. Mex. A. C. 21, 247 (2004).
69. RUBINOV, A.V.: "Dynamical Evolution of Multiple Stars: Influence of the Initial
Parameters of the System", Astron. Reports 48, (1), 45 (2004).
70. SCARFE, C.D.; GRIFFIN , R.F. & GRIFFIN, R.E.M.: "The Double-Lined Spectroscopic
Binary HR 6046", Rev. Mex. A. C. 21, 79 (2004).
71. SIMON, M. & PRATO, L.: "The Double-lined Spectroscopic Binary Haro 1-14c",
Astrophys. J. Lett. 613, (1), L69 (2004).
72. SKULJAN, J. ; RAMM, D.J. & HEARNSHAW, J.B.: "Accurate orbital parameters for the
bright southern spectroscopic binary zeta Trianguli Australis - an interesting case
of a near-circular orbit", Monthly Notices 352, (2), 975 (2004).
73. STRIGACHEV, A. & LAMPENS, P.: "Multicolour CCD measurements of nearby visual double
stars. II", Astron. Astrophys. 422, (3), 1023 (2004).
74. STASSUN, K.G. et al.: "Dynamical Mass Constraints on Low-Mass PreMain-Sequence
Stellar Evolutionary Tracks: An Eclipsing Binary in Orion with a 1.0 Msun Primary and
a 0.7 Msun Secondary", Astrophys. J. Suppl. Ser. 151, (2), 357. (2004).
75. TAMAZIAN, V.S.: "Orbit of T TAU Ba-Bb and Mass Estimate for its Infrared Companion",
Astron. J. 127, (4), 2378 (2004).
76. TOKOVININ, A.: "Statistics of multiple stars", Rev. Mex. A. C. 21, 7 (2004).
77. TOKUNAGA, A.T. et al.: "A Subarcsecond Companion to the T Tauri Star AS 353B",
Astron. J. 127, (1), 444 (2004).
78. VALTONEN, M.: "Three-body problem and multiple stellar systems",
Rev. Mex. A. C. 21, 147 (2004).
79. VANBEVEREN, D.: "The effects of binaries on population studies",
Rev. Mex. A. C. 20, 85 (2004).
80. WANG, H. et al.: " FU Orionis: A Binary Star?",
Astrophys. J. Lett. 601, (1), L83 (2004).
81. YOO, J.; CHANAME, J. & GOULD, A.: "The End of the MACHO Era: Limits on Halo Dark
Matter from Stellar Halo Wide Binaries", Astrophys. J. 601, (1), 311 (2004).
82. ZAPATERO, M. R. & MARTIN, E. L.: " A CCD imaging search for wide metal-poor
binaries", Astron. Astrophys. 419, (1), 167 (2004).
83. ZAPATERO, M. R. et al.: "Dynamical Masses of the Binary Brown Dwarf GJ 569 Bab",
Astrophys. J. 615, (2), 958 (2004).
84. ZINNECKER, H.; KOHLER, R. & JAHREISS, H.: "Binary statistics among population II
stars", Rev. Mex. A. C. 21, 33 (2004)
85. ZUCKER, S. et al.: "Multi-order TODCOR: Application to observations taken with the
CORALIE echelle spectrograph. II. A planet in the system HD 41004",
Astron. Astrophys. 426, (2), 695 (2004).
86. ZWAHLEN, N. et al.: " A purely geometric distance to the binary star Atlas, a member
of the Pleiades", Astron. Astrophys. 425, (3), L45 (2004).
87. ZWITTER, T. & MUNARI, U.: "Spectroscopy, Photometry and Micro-arcsec Astrometry of
Binaries with the GAIA Space Mission and with the RAVE Experiment",
Rev. Mex. A. C. 21, 251 (2004).
NOTE
Dear colleagues,
William H. Hartkopf (President of the IAU Comm. 26 and Webmaster of the webpage) and we
ourselves have delivery problems with the e-mail addresses for the following Commission
members: (note: email address removed from web version for security reasons - wih)
- John L. Hershey
- Bambang Hidayat (email okay)
- Pavel Kroupa (new email address received)
- Claude Meyer
- Joseph I. Smak
- Wean-Shun Tsay
So we ask anyone who knows the current e-mail addresses of these members to please get
in touch with us.
Thanks in anticipation.
The Editors.
ANNOUNCEMENT
A MODEL OF THE ORIENTATION OF THE ORBITAL PLANES OF THE VISUAL DOUBLE STARS
A research made at the Observatoire Royal de Belgique some thirty-five years ago by J.
Dommanget and O. Nys, has shown some specific space organisation of the orbital planes
of the visual double stars on the contrary of what was thought since more than a century.
A tri-dimensional model based on 70 stars showed this organisation very clearly especialy
in the Sun's environment. Twenty years later a second research (1982-1987) concerning 145
stars, confirmed this result which was observed with more precision on a second model
that was exhibited, during the IAU Colloquium n.97 "Wide components in double and
multiple stars" held at Brussels in 1987. (See: Astrophysics and Space Science, 142, 1988,
pp. 171-176).
A short presentation of this model has recently been given in the Bulletin de la
Commission des Etoiles doubles de la Societe Astronomique de France, n.42 of
march 2004, pp. 13-14 and an historical synthesis of the various researches made on this
subject since 1838 by J. H. MADLER will appear in Ciel et Terre n.121, 1, 2005.
On these occasions and on that of a few talks on the subject, it was decided to transfer
this model from the Observatoire Royal de Belgique to the Observatoire de la Cote d'Azur,
France where it will be preserved. In the framework of the project "Museal", near to the
historical refractors of the Nice Observatory, this model will be integrated in the
presentation devoted to the double star researches.
J. Dommanget.
GEOFFREY G. DOUGLASS (1942 - 2005)
We have the sad duty to report the passing of longtime Commission 26 member
Geoffrey G. Douglass, who died 15 February 2005 after a long illness.
Geoff worked at the U.S. Naval Observatory for over 30 years, until his retirement
in January 1999. Much of his work involved observations of visual double stars,
from collaborating on the photographic program in the late 1960's to development
of the USNO's speckle interferometry program throughout the 1990's. A brief summary
of his work can be found at http://ad.usno.navy.mil/wds/history/douglass.html .
Geoff collaborated with Charles Worley from 1968 until Charles' death in December
1997, writing much of the double star software and assisting in the production of
the observatory's double star catalogs. It was often joked that the "W" and "D" in
the WDS (officially the "Washington Double Star" catalog) really stood for
"Worley" and "Douglass".
During his last year at the observatory he oversaw the publication of over 10,000
speckle observations, and guided the recently hired Brian Mason (Charles' replacement)
in the management of the double star program. He continued to have an interest in the
activities at the USNO even during his long hospitalizaton, and was regularly sought
out for his knowledge on instrumentation and earlier observations.
Those of you who knew Geoff also knew he battled illness for many years. He
was a symbol of the worthiness of organ donation, living for some two decades
following a kidney transplant, before succumbing to complications following kidney
failure.
Geoff is survived by his wife Doris, with whom he shared a love of cats and
classical music, as well as passionate religous beliefs. He will be sorely missed by
his many friends and colleagues.
William Hartkopf and Brian Mason.
U.S. Naval Observatory.
***********************************************************************
The deadline for contributions to Information Circular No. 156 is:
June 15th 2005
J. A. Docobo (oadoco@usc.es)
J. F. Ling (oafana@usc.es)
Tel: +34 981592747
Fax: +34 981597054
Observatorio Astronomico "R. M. Aller"
P. O. Box 197
Universidade de Santiago de Compostela
SPAIN
http://www.usc.es/astro
ISSN: 1024-7769
INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS)
INFORMATION CIRCULAR No. 156 (JUNE 2005)
NEW ORBITS
ADS Name P (yr) T e W(2000) 2005 Author
RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2006
---------------------------------------------------------------------------------------
328 HU 506 169.29 1955.06 0.163 30.1 87.4 0.112 DOCOBO &
00243+5201 2.1265 0.214 64.8 311.8 2004.9902 90.8 0.109 ANDRADE
490 HO 212 AB 6.89 2000.98 0.773 149.0 268.2 0.293 MASON &
00352-0336 52.2185 0.241 49.4 283.8 2004.923 283.2 0.278 HARTKOPF
701 A 1808 112.40 1975.99 0.827 163.1 197.2 0.182 DOCOBO &
00516+2237 3.2029 0.121 17.8 231.9 2004.9903 197.9 0.184 ANDRADE
HJ 3423 857.0 1763.50 0.384 10.3 320.4 5.00 SCARDIA &
01158-6853 0.4201 5.960 127.1 284.9 1999.795 320.0 5.00 PANSECCHI
COU 750 58.18 2000.40 0.752 23.2 24.7 0.255 DOCOBO
01450+2703 6.1877 0.356 80.9 247.4 2004.9903 25.9 0.282 & LING
MLR 377 161.26 1918.14 0.115 154.1 145.9 0.570 PAVLOVIC &
02231+7021 2.2324 0.587 104.3 199.1 2001.9882 145.4 0.560 TODOROVIC
WOR 2 24.07 1987.35 0.296 100.6 100.1 0.399 DOCOBO &
02288+3215 14.9564 0.361 82.9 122.5 2004.9903 101.6 0.372 TAMAZIAN
3608 A 1844 AB 25.21 1950.01 0.291 202. 304.4 0.238 MASON &
05017+2640 14.2800 0.259 17.0 3. 2001.5197 318.7 0.257 HARTKOPF
4208 STF 749 986.6 1756.85 0.411 164.0 322.2 1.15 SCARDIA &
05371+2655 0.3649 1.015 153.3 70.9 2005.215 322.0 1.16 et al. (*)
4392 STT 118 508.02 1805.61 0.015 136.3 319.2 0.074 PAVLOVIC &
05484+2052 0.7086 0.646 89.7 121.1 1993.7628 319.5 0.066 TODOROVIC
10074 GNT 1 1217.54 1273.67 0.079 91.0 276.5 2.677 PAVLOVIC &
16294-2626 0.2957 2.928 80.8 0.0 1997.512 276.6 2.669 TODOROVIC
14648 BU 368 AB 251.06 1958.09 0.554 91.6 279.1 0.103 PAVLOVIC &
21074-0814 1.4339 0.500 88.6 128.6 2001.8677 279.9 0.095 TODOROVIC
15398 HU 972 AB 152.20 1962.25 0.637 10.5 249.2 0.309 MANTE
21511+6650 2.3652 0.304 48.1 93.0 1997.6930 250.3 0.310
COU 432 BC 29.53 1986.97 0.586 178.4 5.3 0.181 MANTE
21543+1943 12.1910 0.120 125.0 335.0 1997.7160 2.7 0.178
15962 BU 701 554.46 2288.31 0.139 118.1 185.8 0.941 CVETKOVIC
22281+1215 0.6493 1.400 124.1 105.4 1999.855 185.0 0.945 & OLEVIC
15992 HU 388 368.59 1934.94 0.761 18.2 60.5 0.495 CVETKOVIC
22302+2228 0.9767 0.431 34.4 256.5 2003.9568 60.8 0.498 & OLEVIC
WRH 37 AaB 159.66 2006.34 0.551 4.2 211.6 0.102 OLEVIC &
23019+4220 2.2547 0.322 114.7 132.0 2000.6171 204.7 0.115 CVETKOVIC
BLA 12 Aa 8.3 1982.43 0.550 54.0 121.0 0.040 OLEVIC &
23019+4220 43.3735 0.040 179.9 55.7 1997.518 51.4 0.021 CVETKOVIC
(*) SCARDIA, PRIEUR, PANSECCHI, ARGYLE
RICHARD L. "DICK" WALKER (1938 - 2005)
We have the sad duty to report the death of a member of Commission 26. Richard L. "Dick"
Walker died March 30, 2005, after having been in declining health for the last couple years.
Dick was born March 9, 1938 in Hampton, Iowa and earned degrees in astronomy and physics
from the University of Iowa. He worked for the U.S. Naval Observatory (both in Washington,
DC and Flagstaff, Arizona) for over 30 years, before his retirement in 1999. From the mid
1960s through the late 1970s much of Dick's time was devoted to the measurement of binary
stars, observing with the 12" and 26" refractors in Washington and later the 40" and 61"
reflectors in Flagstaff. He also made many trips to Lick Observatory to work with the 36"
Clark Refractor there. During this time he consulted with Charles Worley (who was
observing on the 26") to make sure time was well spent examining doubles which could not
be observed in Washington. This period of observing overlapped with the early years of
speckle interferometry, and Dick's observations, made with the largest telescope used for
micrometry at the time, were very important to ascertain the veracity of this new technique.
He was a studious and very careful observer of doubles and made over 8000 measures, resulting
in almost 3000 mean positions. While measuring known systems for orbital analysis, he
discovered 22 pairs (mostly additional components to these systems) and ascertained the
physicality of these new pairs. He also calculated orbits to four fastmoving pairs, and his
highlighting the rapid motion of these systems resulted in them being placed on many programs
and led to the more definitive orbits of today.
Dick also ventured into other areas of astronomy, among them discovering the moon of Saturn,
Epimetheus, in December 1966, with the USNO Flagstaff 61" astrometric reflector.
Dick is survived by his wife, Patricia, six children, ten grandchildren, and two
greatgrandchildren, who were no doubt a great inspiration in his many interests, among them,
writing children's literature. He will be sorely missed by his many friends and colleagues.
A few photos of Dick may be found on the USNO double star website at
http://ad.usno.navy.mil/wds/history/walker.html.
William Hartkopf & Brian Mason.
U.S. Naval Observatory.
ANNOUNCEMENTS
CHANGES IN THE DOUBLE STAR DATABASE
We have recently made changes in the Washington Double Star Catalog and some of its related
catalogs which we wanted to bring to your attention.
(1) The format of the WDS has been altered slightly. The column for number of mean positions
can now accommodate values up to 9,999 (the largest number in the catalog currently is
STF2272, with 1,642 published means). We have reordered the proper motion columns, added
an additional column for notes, and increased the accuracy of the precise coordinate by
an order of magnitude in both axes, in order to be consistent with the WMC. Currently
greater than 96the WDS have precise coordinates.
(2) We have continued our effort to match and extract double star data from wide-field single
epoch astrometric catalogs. To date, measures have been extracted for 40,209 pairs from
the 2MASS Catalog and an additional 70,057 from the 144 astrometric catalogs used for the
computation of Tycho-2 proper motion. This has helped increase the size of the WDS database
to 711,174 mean positions of 100,784 systems. The next big task will be the matching and
extraction of UCAC data, following that project's final astrometric reduction and catalog
publication, scheduled for 2006.
(3) The Sixth Orbit Catalog now also includes formal errors to the orbital elements when listed
in the original publication.
(4) Data request software now provides figures illustrating all WDS data for systems with
published orbital elements.
(5) Also scheduled for release in 2006 is the Second USNO Double Star CD. This will include
current updates of all our catalogs and several other enhancements (such as new lists of
"neglected doubles"). We anticipate no other format changes to the Double Star Catalogs in
the foreseeable future.
As always, we appreciate notification of any errors or missing data in our catalogs. Tables
(preferably electronic) of newly published data are also most welcome.
Brian D. Mason, William I. Hartkopf & Gary L. Wycoff
U.S. Naval Observatory
JOURNAL OF DOUBLE STAR OBSERVATIONS
R. Kent Clark and Rod Mollise of the The University of South Alabama are editing a new
publication called the "Journal of Double Star Observations." According to their web page it
is a "quarterly journal of amateur astronomy dedicated to the observation and study of double
and binary stars." The first issue in pdf format and solicitation for articles and comments is
available at their web site :
http://www.southalabama.edu/physics/jdso/
Congratulations to Kent and Rod!
Brian D. Mason
U.S. Naval Observatory
ENGLISH VERSION OF LIADA CIRCULAR #2
The Amateur Double Star Section of LIADA (American-Spanish League of Astronomy) has edited their
Circular #2 (in english) where there have been published 367 relative astrometry measures for 67
visual double stars (using CCD images, Digitized Sky Survey and Two Micron All Sky Survey images)
most of them are very neglected or unconfirmed pairs that many have not been resolved for more
than 180 years. These measures in addition to BVIJHK optical-to-infrared photometry (from Tycho-2
and 2MASS), kinematical data and historical relative astrometry (from WDS) allow us to obtain
spectral types and luminosity classes, photometric parallaxes, relative motions and other
astrophysical data to classify visual double stars as physical (11Spectral types were estimated
using professional color-spectral type relations and several reduced proper motion diagrams.
Preliminary study results in a mean difference of only 0.5 subclasses of spectral type with
respect to professional results.
Those interested in the circular please contact Francisco Rica at frica0@terra.es.
NEW BINARY CANDIDATE DISCOVERY BY LIADA'S DOUBLE STAR SECTION:
WDS 01116+2823 = FMR 5
LIADA's Double Star Section reports a new binary candidate, catalogued as GSC1753- 1506,
composed of 12.0 and 13.5 magnitudes stars with an angular separation of 4.62 arcsec. at
direction 294.4 degrees. Analyzing 2MASS JHK photometry and Tycho-2 data the binary is
composed of G9V and K5V stars located at 172 pc. The similar spectrophotometric parallaxes of
the components, obtained by us, in addition to the results of several professional criterions
give us strong evidence that point to a physical association of both components. Nevertheless
it is necessary to have more relative astrometric data to confirm the physical nature. The
expected semi mayor axis is 1,194 A.U. and the approximate orbital period could be 35,000 years.
Francisco Manuel Rica Romero (Coordinator)
LIADA Double Star Section
FRICA0@terra.es
***********************************************************************
The deadline for contributions to Information Circular No. 157 is:
October 15th 2005
J. A. Docobo (oadoco@usc.es)
J. F. Ling (oafana@usc.es)
Tel: +34 981592747
Fax: +34 981597054
Observatorio Astronomico "R. M. Aller"
P. O. Box 197
Universidade de Santiago de Compostela
SPAIN
http://www.usc.es/astro
ISSN: 1024-7769
INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS)
INFORMATION CIRCULAR No. 157 (OCTOBER 2005)
NEW ORBITS
ADS Name P (yr) T e W(2000) 2005 Author
RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2006
---------------------------------------------------------------------------------------
1530 A 2407 136.98 2026.29 0.178 151.0 304.8 0.514 MANTE
01554+0257 2.6282 0.597 41.9 221.4 1991.75 307.4 0.515
1613 A 1813 AB-C 310.51 2210.24 0.636 168.5 204.7 1.595 NOVAKOVIC
02022+3643 1.1594 1.790 113.2 135.5 2001.786 204.3 1.611 & TODOROVIC
2271 A 1529 105.48 1966.00 0.731 165.4 163.0 0.251 DOCOBO &
03006+4753 3.4130 0.159 98.0 208.1 2004.99053 162.8 0.251 TAMAZIAN
3323 HU 610 59.25 2004.71 0.383 98.1 257.2 0.102 DOCOBO &
04364+3413 6.0760 0.176 46.2 146.8 2004.99067 268.0 0.108 TAMAZIAN
COU 2031 20.46 2008.93 0.273 148.1 222.4 0.022 DOCOBO &
04464+4221 17.5953 0.152 81.8 188.4 2004.99070 303.4 0.044 TAMAZIAN
6828 A 551 AB 54.70 2001.80 0.429 62.4 290.4 0.027 DOCOBO
08285-0231 6.5814 0.283 83.7 211.0 2004.991 22.6 0.034 & LING
KUI 44 100.76 2000.49 0.867 29.4 254.3 0.037 DOCOBO &
09498+2111 3.5729 0.195 104.7 335.3 2004.9912 245.1 0.050 TAMAZIAN
KUI 44 113.1 2000.31 0.887 27.9 257.3 0.042 LAMPENS
09498+2111 3.1830 0.208 107.5 332.0 2004.9912 249.1 0.055 et al. (*)
SEE 119 16.54 2002.72 0.746 28.2 337.2 0.274 DOCOBO
10373-4814 21.7654 0.368 129.1 283.2 1997.0903 322.7 0.311 & LING
KUI 84 14.86 2001.48 0.528 171.3 335.2 0.175 DOCOBO
17584+0428 24.2261 0.161 59.8 10.4 1998.7766 342.3 0.210 & LING
11311 STT 353 AB 307.8 2116.6 0.752 70.3 269.1 0.467 ANDRADE
18208+7120 1.1696 0.965 95.6 275.0 1998.679 268.8 0.472
11336 STF 2323 AB 3962.50 5671.40 0.553 179.9 348.9 3.750 NOVAKOVIC
18239+5848 0.0909 6.621 107.7 128.0 2000.29 348.8 3.749 & TODOROVIC
11635 STF 2382 AB 1804.41 2091.43 0.691 162.1 348.8 2.384 NOVAKOVIC
18443+3940 0.1995 4.742 121.2 255.5 2003.806 348.5 2.372 & TODOROVIC
12656 HU 679 103.40 1977.30 0.579 28.0 251.7 0.369 ANDRADE
19351+5038 3.4816 0.315 37.3 81.0 1996.6903 253.4 0.372
HEI 7 31.00 1997.05 0.684 176.2 221.0 0.583 DOCOBO &
20374+7536 11.6092 0.485 39.3 257.7 1999.8825 225.4 0.604 ANDRADE
17050 STT 510 AB 1522.90 1824.50 0.069 96.4 301.8 0.579 NOVAKOVIC
23516+4205 0.2364 0.792 117.2 85.3 2002.834 301.6 0.581 & TODOROVIC
(*) LAMPENS, FR'EMAT & HENSBERGE
ANNOUNCEMENTS
MULTIPLE STAR CATALOG (MSC) HAS A NEW ON-LINE INTERFACE
http://www.ctio.noao.edu/ atokovin/stars/index.php
As of August 2005, MSC contains 1024 physical systems of multiplicity from 3 to 6. It is
expected that the on-line version will be updated regularly. Please, send corrections or
information on the new systems to A. Tokovinin, atokovinin@ctio.noao.edu.
Andrei Tokovinin
Cerro Tololo Inter-American Observatory
IAU SYMPOSIUM 240
We are proud to announce IAU Symposium 240, "Binary Stars as Critical Tools & Tests in
Contemporary Astrophysics", to be held 22-25 August 2006, during the International
Astronomical Union's 26th General Assembly in Prague, Czech Republic.
We believe this is the first major meeting in recent memory bringing together members of
both the "wide" and "close" binary communities; it is therefore appropriate that the
meeting be co-sponsored by Commissions 26 (Double and Multiple Stars) and 42 (Close
Binary Stars) with the support of 11 other commissions and working groups.
Topics to be included range from common proper motion pairs and other "fragile" binaries
to contact binaries and star/brown-dwarf and star/planet systems, from longbaseline
interferometry to theories of binary formation and anticipated results of Gaia and other
large-scale surveys. Our goal is to have a meeting which will appeal to all binary and
multiple star star researchers, where astronomers in different binary star field may
find areas of common interest.
Please see the symposium website, http://ad.usno.navy.mil/iaus240/, for a preliminary
program and other information concerning this meeting.
William Hartkopf, Petr Harmanec and Ed Guinan Symposium 240 co-chairs
***********************************************************************
The deadline for contributions to Information Circular No. 158 is:
February 15th 2006
J. A. Docobo (oadoco@usc.es)
J. F. Ling (oafana@usc.es)
Tel: +34 981592747
Fax: +34 981597054
Observatorio Astronomico "R. M. Aller"
P. O. Box 197
Universidade de Santiago de Compostela
SPAIN
http://www.usc.es/astro
ISSN: 1024-7769
INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS)
INFORMATION CIRCULAR No. 158 (FEBRUARY 2006)
NEW ORBITS
ADS Name P (yr) T e W(2000) 2006 Author
RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2007
---------------------------------------------------------------------------------------
463 HO 3 64.53 1984.84 0.290 116.5 169.5 0.205 CVETKOVIC
00335+4006 5.5784 0.388 111.6 143.1 1996.691 163.1 0.225
684 BU 232 AB 200.96 1914.52 0.621 64.9 250.5 0.85 SCARDIA
00504+5038 1.7914 0.531 31.9 11.4 2006.025 250.9 0.86 et al. (*)
836 A 2901 1517.34 1950.56 0.621 48.4 60.6 0.409 NOVAKOVIC
01015+6922 0.2373 0.990 69.3 330.2 2001.8352 61.0 0.408
1345 A 1 357.02 2205.28 0.299 76.1 249.7 0.818 NOVAKOVIC
01424-0645 1.0083 0.641 50.8 1.9 2003.9600 250.1 0.819
1380 STF 148 625.27 2013.18 0.689 147.9 242.3 0.136 NOVAKOVIC
01461+6349 0.5757 1.081 67.6 121.6 1997.03 252.3 0.137
1729 A 2013 34.66 2005.69 0.593 91.8 282.7 0.130 DOCOBO
02159+0638 10.3866 0.346 112.3 137.6 2004.9904 265.8 0.165 & TAMAZIAN
2799 STT 65 61.00 1998.39 0.635 27.3 183.1 0.087 DOCOBO
03503+2535 5.9016 0.411 84.3 340.5 2004.9906 190.0 0.127 & LING
GLE 1 480. 1990.90 0.630 92.3 184.4 0.329 DOCOBO
04163-6057 0.7500 0.890 34.1 35.4 2001.8923 187.8 0.336 & LING
3326 A 1840 AB 128.58 2003.60 0.551 62.4 332.5 0.071 CVETKOVIC
04362+0814 2.7998 0.222 133.0 62.8 1996.869 317.5 0.075
RST 3401 159.41 1966.85 0.473 96.2 273.6 0.420 NOVAKOVIC
04374-0951 2.2583 0.354 143.3 46.2 1991.25 272.5 0.424
3434 HU 612 309.87 1903.76 0.424 3.8 357.6 0.652 NOVAKOVIC
04478+5318 1.1618 0.502 40.3 200.9 2004.924 358.1 0.655
4020 A 848 534.41 2425.78 0.315 19.8 174.5 0.295 NOVAKOVIC
05255-0033 0.6736 0.400 66.3 17.2 2002.136 175.0 0.298
4229 BU 1240 AB 52.74 1974.93 0.653 127.1 333.9 0.207 RICA
05386+3030 6.8266 0.154 124.2 309.1 2004.095 332.3 0.209
4376 STF 3115 976.83 2131.60 0.338 48.8 338.6 0.790 NOVAKOVIC
05491+6248 0.3685 1.350 131.8 159.4 2003.12 337.9 0.787
5296 STF 945 2679.33 4486.86 0.534 67.4 328.9 0.471 NOVAKOVIC
06404+4058 0.1344 2.307 72.1 186.7 2002.19 329.7 0.471
5726 A 1959 31.85 1988.36 0.008 172.3 166.3 0.255 DOCOBO
07036+3941 11.3030 0.259 63.3 147.7 2004.9911 171.4 0.261 & TAMAZIAN
6381 STF 1146 570.44 2054.74 0.610 12.5 347.4 1.231 NOVAKOVIC
07479-1212 0.6311 2.409 113.9 149.9 2003.253 346.6 1.200
6825 A 550 21.23 1981.30 0.866 71.6 195.9 0.111 CVETKOVIC
08277-0425 16.9589 0.099 149.6 82.1 1996.867 190.8 0.125
COU 1897 165.00 1985.80 0.334 168.1 241.3 0.107 DOCOBO
08585+3548 2.1818 0.255 61.1 2.3 2004.9911 247.0 0.106 & TAMAZIAN
COU 1569 117.00 1997.78 0.494 60.7 253.0 0.135 DOCOBO
10059+3412 3.0769 0.237 69.3 140.1 2004.9913 255.9 0.133 & TAMAZIAN
7730 STF 1426 AB 2208.98 2011.15 0.484 127.0 310.3 0.921 NOVAKOVIC
10205+0626 0.1630 1.794 61.1 189.4 2004.304 310.5 0.920
FIN 367 Aa 116.27 2052.18 0.470 155.0 6.1 0.197 MANTE
12064-6543 3.0963 0.222 112.4 286.8 1993.0930 4.8 0.201
9744 HU 580 AB 21.97 2006.98 0.084 70.3 260.7 0.106 DOCOBO
15416+1940 16.3860 0.210 83.2 256.3 2001.5591 276.9 0.050 & LING
11524 HU 198 877.14 2020.98 0.446 130.1 131.0 0.462 NOVAKOVIC
18384+0850 0.4104 0.822 103.7 14.1 2004.2073 130.7 0.461
11956 STF 2437 804.60 2132.95 0.478 114.9 11.4 0.58 SCARDIA
19019+1910 0.4474 0.910 131.0 212.1 2005.662 10.8 0.58 et al. (*)
LAB 6 Aa 83. 1997.99 0.732 46.4 44.2 0.123 ANDRADE
21287+7034 4.3374 0.195 87.3 194.6 1998.777 44.5 0.140
16731 STT 495 300. 1935.2 0.980 138.6 121.6 0.364 ALZNER
23241+5732 1.2000 0.296 71.0 142.4 2005.80 121.7 0.367
(*) SCARDIA, PRIEUR, PANSECCHI, ARGYLE & BASSO
PAPERS PUBLISHED IN 2005
1. ABT, H. A.: "Observed Orbital Eccentricities". Astrophys. J. 629 (1), 507 (2005).
2. ALZNER, A.: "Micrometer Measurements from 2002.97 to 2004.94". The Webb Soc. Double
Star Section Cir. 13, 6 (2005).
3. ANCONELLI, B. et al.: "Restoration of interferometric images - IV. An algorithm for
super-resolution of stellar systems". Astron. Astrophys. 431 (2), 747 (2005).
4. ARGYLE, R.: "Micrometer Measurements from 2004.0 to 2005.0". The Webb Soc. Double
Star Section Cir. 13, 1 (2005).
5. BAKIS, V. et al.: "Astrometric Solution of the Multiple System Xy Leo". Astrophys.
Space Science 296 (1-4), 131. (2005).
6. BALEGA, I. I. et al.: "Orbits of new Hipparcos binaries. I." Astron. Astrophys. 433
(2), 591 (2005).
7. BALEGA, Y. Y.; LEUSHIN, V. V. & WEIGELT, G.: "Atmospheric Elemental Abundances for
the Components of the Multiple System ADS 11061. 41 Draconis." Astron. Reports 49
(3), 217 (2005)
8. BALEGA, Y. Y.; LEUSHIN, V. V. & KUZNETSOV, M. K: "Atmospheric Chemical Abundances of
the Components of the Quadruple System ADS 11061. 40 Draconis." Astron. Reports 49
(12), 984 (2005)
9. BODEN, A. F.; TORRES, G. & HUMMEL, C. A.: "Testing Stellar Models with an Improved
Physical Orbit for 12 Bootis". Astrophys. J. 627 (1), 464 (2005).
10. BODEN, A. F. et al.: "Dynamical Masses for Low-Mass PreMain-Sequence Stars: A
Preliminary Physical Orbit for HD 98800 B". Astrophys. J. 635 (1), 442 (2005).
11. BONNELL, I. A. & BATE, M. R.: "Binary systems and stellar mergers in massive star
formation". Monthly Notices 362 (3), 915 (2005)
12. BOUY, H. et al.: "A possible third component in the L dwarf binary system
DENIS-P J020529.0-115925 discovered with the HUBBLE space telescope". Astron. J.
129 (1), 511 (2005).
13. BRANHAM, R. L.: "Calculating the Apparent Orbit of a Double Star". Astrophys. J. 622
(1), 613 (2005).
14. CARQUILLAT, J.-M.; PRIEUR, J.-L. & UDRY, S.: "Contribution to the study of F-G-K-M
binaries. X. HD 54901, HD 120544 and HD 123280, three nearby F-type spectroscopic
binaries". Astron. Nach. 326 (1), 31 (2005).
15. CARQUILLAT, J.-M.; PRIEUR, J.-L. & GINESTET, N.: "Contribution to the study of
composite spectra X. HD 3210/1, 27395, 39847, 70826 and 218257/8: five new
spectroscopic binaries in multiple systems". Monthly Notices 360 (2), 718 (2005)
16. DAVIS, J. et al.: "Orbital parameters, masses and distance to beta Centauri determined
with the Sydney University Stellar Interferometer and high-resolution spectroscopy".
Monthly Notices 356 (4), 1362 (2005)
17. FEKEL. F. C. & W. HENRY, G. W.: "Chromospherically active stars. XXIV. The giant
single-lined binaries HD 37824, HD 181809, and HD 217188". Astron. J. 129 (3), 1669
(2005).
18. FEKEL. F. C. et al.: "HD 166181 = V815 Herculis, a single-lined spectroscopic multiple
system". Astron. J. 129 (2), 1001 (2005).
19. FRASCA, A. & LANZA, A. F.: "Orbital period variation in close binaries from radial
velocity data and magnetic activity cycles - II. HR 1099." Astron. Astrophys. 429
(1), 309 (2005).
20. GATEWOOD, G.: "An astrometric study of the binary star alpha Ophiuchi". Astron. J. 130
(2), 809 (2005).
21. GRIFFIN, R. F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 180: Zeta Aurigae". The Observatory 125, 1 (2005).
22. GRIFFIN, R. F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 181: HD 49635/6, HD 50730/1, HD 201563, and HD 203340". The Observatory 125,
81 (2005).
23. GRIFFIN, R. F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 182: 22 Camelopardalis, HD 156051, HR 6890, and HD221757". The Observatory 125,
134 (2005).
24. GRIFFIN, R. F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 183: HD 98031, HD 112573, and HD197913". The Observatory 125, 253 (2005).
25. GRIFFIN, R. F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 184: HD 106383, HD 109070, HD 118157, and HD 121213". The Observatory 125,
300 (2005).
26. GRIFFIN, R. F.: "The BY Dra Star HD 77191 is a Spectroscopic Binary, but GQ Leo
may not be". The Observatory 125, 323 (2005).
27. GRIFFIN, R. F.: "Spectroscopic Binary Orbits from Photoelectric Radial Velocities -
Paper 185: HD 15850, HR 2452, HR 5769, and HD 193468". The Observatory 125, 367
(2005).
28. GRIFFIN, R. F.: "Radial-Velocity Observations That Just Missed a Periastron Passage
of 34 Leonis". The Observatory 125, 388 (2005).
29. HONIG, S. F. & TSCHARNUTER, W. M.: "Preliminary orbital elements of four
interferometric binary stars". Astron. J. 129 (3), 1663 (2005).
30. HUBBER, D. A. & WHITWORTH, A. P.: "Binary star formation from ring fragmentation".
Astron. Astrophys. 437 (1), 113 (2005).
31. JANCART, S. et al.: "Astrometric orbits of S_BO stars". Astron. Astrophys. 442 (1),
365 (2005).
32. KONACKI, M.: "Precision Radial Velocities of Double-lined Spectroscopic Binaries
with an Iodine Absorption Cell". Astrophys. J. 626 (1), 431(2005).
33. KOENIG, B. et al.: "The young active binary star EK Draconis" Astron. Astrophys. 435
(1), 215 (2005).
34. KOUWENHOVEN, M. B. N. et al.: "The primordial binary population - I. A near-infrared
adaptive optics search for close visual companions to A star members of Scorpius
OB2". Astron. Astrophys. 430 (1), 137 (2005).
35. LAMPENS, P. et al.: "A photometric study of the light variations of the triple system
DG Leo". Astron. Astrophys. 438 (1), 201 (2005).
36. LUHMAN, K. L.: "Discovery of a Wide, Low-Mass Binary System in Upper Scorpius".
Astrophys. J. Lett. 633 (1), L41 (2005).
37. MAKAROV, V. V. & KAPLAN, G. H.: "Statistical Constraints for Astrometric Binaries with
Nonlinear Motion". Astron. J. 129 (5), 2420 (2005).
38. MANSET, N.; BASTIEN, P. & BERTOUT, C.: "Polarimetric variation of binary stars. VI.
Orbit-induced variations in the Premain-Sequence Binary AK Scorpii". Astron. J. 129
(1), 480 (2005).
39. MAYER, P.: "Triple and Multiple Systems". Astrophys. Space Science 296 (1-4), 113.
(2005).
40. MUGRAUER, M. et al.: "Four new wide binaries among exoplanet host stars". Astron.
Astrophys. 440 (3), 1051 (2005).
41. NAZE, Y. et al.: "Optical spectroscopy of X-Mega targets V. The spectroscopic binary
HD 93161 A and its visual companion HD 93161 B". Monthly Notices 359 (2), 688 (2005).
42. OLEVIC, D. & CVETKOVIC, Z.: "Orbital Elements, Dynamical Masses and Parallaxes for
Four Double and One Triple Systems." Serbian Astron. J. 170, 65 (2005).
43. OLEVIC, D. & CVETKOVIC, Z.: "Orbits of Six Binary Stars." Rev. Mex. A. A. 41, 17
(2005).
44. ORLOV, V. V. & ZHUCHKOV, R. Y.: "Analysis of the Dynamic Stability of Selected Multiple
Stars with Weak Hierarchy". Astron. Reports 49 (3), 201 (2005).
45. PAVLOVIC, R. & TODOROVIC. N.: "Orbits of Seven Edge-On Visual Double Stars".
Serbian Astron. J. 170, 73 (2005).
46. PAVLOVIC, R. et al.: "CCD Measurements of Double and Multiple Stars at NAO Rozhen".
Serbian Astron. J. 171, 49 (2005).
47. PHAN-BAO, N. et al.: "Discovery of a widely separated binary system of very low mass
stars". Astron. Astrophys. 439 (2), L19 (2005).
48. PLUZHNIK, E. A.: "Differential photometry of speckle-interferometric binary and multiple
stars." Astron. Astrophys. 431 (2), 587 (2005).
49. POURBAIX, D. et al.: "Candidate spectroscopic binaries in the Sloan Digital Sky
Survey". Astron. Astrophys. 444 (2), 643 (2005).
50. RAMM, D. J.; HEARNSHAW, J. B. & SKULJAN, J.: "Spectroscopic Mass Ratios for Two Visual
Binaries". The Observatory 125, 30 (2005).
51. RICHICHI, A.; PERCHERON, I. & KHRISTOFOROVA, M.: "CHARM2: An updated Catalog of High
Angular Resolution Measurements." Astron. Astrophys. 431 (2), 773 (2005).
52. ROBERTS, L. C. et al.: "Adaptative optics photometry and astrometry of binary stars".
Astron. J. 130 (5), 2262 (2005).
53. RUTKOWSKI, A. & WANIAK, W.: "Speckle Observations of Binary Stars with a 0.5 m
Telescope". Pub. Astron. Soc. of the Pacific 117 (838), 1362 (2005).
54. SCARDIA, M. et al.: "Speckle observations with PISCO in Merate - I. Astrometric
measurements of visual binaries in 2004." Monthly Notices 357 (4), 1255 (2005).
55. SIEGLER, N. et al.: "Discovery of Two Very Low Mass Binaries: Final Results of an
Adaptive Optics Survey of Nearby M6.0M7.5 Stars". Astrophys. J. 621 (2), 1023 (2005).
56. SILVESTRI, N. M.; HAWLEY, S. L. & OSWALT, T. D.: "The chromospheric activity and ages
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***********************************************************************
The deadline for contributions to Information Circular No. 159 is:
June 15th 2006
J. A. Docobo (oadoco@usc.es)
J. F. Ling (oafana@usc.es)
Tel: +34 981592747
Fax: +34 981597054
Observatorio Astronomico "R. M. Aller"
P. O. Box 197
Universidade de Santiago de Compostela
SPAIN
http://www.usc.es/astro
ISSN: 1024-7769
INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS)
INFORMATION CIRCULAR No. 159 (JUNE 2006)
NEW ORBITS
ADS Name P (yr) T e W(2000) 2006 Author
RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2007
---------------------------------------------------------------------------------------
243 A 803 247.63 2053.72 0.392 151.2 306.4 0.254 NOVAKOVIC
00182+7257 1.4538 0.367 68.6 243.0 1998.6650 307.4 0.256
- BAG 10 Aa 4.85 2003.50 0.224 329.9 265.4 0.028 DOCOBO &
00568+6022 74.2421 0.032 47.6 104.4 1998.7770 316.5 0.034 ANDRADE
805 BU 302 331.97 2017.54 0.665 17.2 200.1 0.290 CVETKOVIC
00583+2124 1.0845 0.651 48.1 252.2 1999.892 203.0 0.279
832 A 926 253.99 2131.63 0.388 74.2 340.2 0.373 CVETKOVIC
01011+6022 1.4174 0.318 32.3 85.7 1998.666 341.0 0.373
828 BU 867 239.84 2000.55 0.222 173.4 354.7 0.579 CVETKOVIC
01014+1155 1.5010 0.745 102.6 160.8 2001.769 354.2 0.582
974 A 655 153.09 2040.77 0.185 157.5 342.0 0.339 CVETKOVIC
01112+4113 2.3515 0.338 53.1 290.5 1995.771 343.4 0.335
- HJ 3447 1503.58 2039.79 0.604 69.6 179.3 0.801 NOVAKOVIC
01361-2954 0.2394 3.155 55.6 140.2 2001.8840 181.0 0.803
1345 A 1 676.7 1885.32 0.719 163.1 250.4 0.836 SCARDIA
01424-0645 0.5320 0.989 44.1 303.0 2006.091 250.7 0.839 et al. (*)
1503 BU 260 931.05 2804.38 0.262 73.0 259.3 1.099 NOVAKOVIC
01532+1526 0.3867 1.303 71.8 119.9 1998.9640 259.5 1.098
1938 STT 42 AB 297.72 1985.66 0.353 96.1 26.7 0.038 NOVAKOVIC
02333+5219 1.2092 0.295 80.3 222.4 1996.6913 37.2 0.042
2204 STF 312 AB 2037.66 2137.36 0.506 14.5 42.6 1.901 NOVAKOVIC
02563+7253 0.1767 3.880 59.8 115.6 2003.9400 42.9 1.888
3589 STT 92 AB 1598.04 3242.73 0.536 155.4 280.6 4.048 NOVAKOVIC
05003+3924 0.2253 5.379 56.1 333.4 2002.9770 280.8 4.060
4078 DA 6 600. 1996.40 0.740 59.7 287.1 0.138 LING
05289-0318 0.6000 0.553 44.9 186.0 1997.1310 291.7 0.138
6526 A 1580 255.28 2013.03 0.232 104.6 288.2 0.245 CVETKOVIC
08017-0836 1.4102 0.318 56.5 202.9 1996.181 289.5 0.243
7730 STF 1426 AB 661.8 1674.23 0.189 114.0 310.2 0.911 SCARDIA
10205+0626 0.5440 0.800 47.2 22.8 2006.308 310.5 0.910 et al. (*)
8555 B 228 44.43 1952.41 0.659 137.3 112.2 0.160 RICA
12274-2843 8.1026 0.178 65.4 166.9 2001.0801 115.0 0.177
8630 STF 1670 AB 169.10 2005.51 0.883 37.1 103.5 0.406 DOCOBO &
12417-0127 2.1289 3.644 149.1 256.7 2006.427 59.5 0.658 TAMAZIAN
8630 STF 1670 AB 169.10 2005.51 0.882 35.3 104.3 0.409 SCARDIA
12417-0127 2.1289 3.643 149.4 255.0 2006.450 60.0 0.657 et al. (*)
10374 BU 1118 AB 87.58 2024.68 0.950 38.9 237.8 0.571 DOCOBO
17104-1544 4.1105 1.396 95.2 274.8 2006.420 237.1 0.575 & LING
10795 STF 2215 1062.47 2066.49 0.397 105.5 254.1 0.484 CVETKOVIC
17471+1742 0.3388 0.838 132.2 270.6 2002.509 253.5 0.480
11010 BU1127AaB 270.82 2102.72 0.365 142.5 57.3 0.822 CVETKOVIC
18025+4414 1.32931 0.732 150.9 239.1 2000.540 56.4 0.819
13665 A 1205 464. 1969.67 0.877 105.8 98.5 1.02 RICA
20182+2912 0.7759 1.54 100.1 251.4 2001.53 98.4 1.03
15300 A 1223 AB 44.09 1972.72 0.322 15.2 344.9 0.131 RICA
21459+1153 8.1651 0.123 159.0 155.4 1998.679 338.2 0.125
15902 BU 172 AB 148.9 1987.64 0.706 91.8 48.1 0.370 DOCOBO
22241-0450 2.4177 0.406 162.2 274.1 2004.721 46.2 0.382 & LING
16886 A 1493 114.0 2011.40 0.230 165.2 300.8 0.108 DOCOBO
23382+5514 3.1579 0.156 142.2 258.7 1996.5405 295.6 0.105 & LING
(*) SCARDIA, PRIEUR, PANSECCHI, ARGYLE ++ BASSO
COMMENTS ABOUT IAU SYMPOSIUM 240
At the occasion of the organization at Prague of this symposium, I feel necessary to recall
that specialists of close double stars and wide ones met at many other important meetings
(colloquia and symposia) well before. Each of them appeared more important than the previous
ones in a logical increasing order and it is thus not surprising that the present one will
be at the top. But only some of them could be considered as "corner stones". I wish that the
next Symposium will be one of these as was the first one of the series, as mentioned by
Mirek PLAVEC in his talk at the 69th IAU Colloquium held at Bamberg in 1981 (Binary and
Multiple Stars as Tracers of Stellar Evolution - Astrophysics and Space Science Library,
98, 1982, pp.119-122) by saying:
"By this format and title, this Colloquium resembles the Colloquium: On the Evolution of
Double Stars, held at Brussels 15 years ago, in September 1966 (Dommanget, 1967). That was
a memorable colloquium, since the evolution in binary stars was, for the first time, the
topic of a whole meeting. Since then, our field has expended tremendously. We held two
large-scale Symposia discussing the evolution of close binaries only (Eggleton, Mitton and
Whelan, 1976; Plavec, Popper and Ulrich, 1980) in addition to several other meetings in a
slightly lower scale. After the most recent Symposium, held in Toronto in 1979, I concluded
that in the future it would no longer be possible to cover adequately, in one full Symposium,
the whole fields of close binaries."
J. Dommanget.
WULFF DIETER HEINTZ (1930 - 2006)
Once again I have the sad duty of noting the passing of a long-time member of Commission 26.
Dr. Wulff Dieter Heintz died over the weekend of June 10/11, 2006, following a long battle with
theillness.
Wulff Heintz was one of the giant figures in double star astronomy for many decades. As an
observer of visual doubles he was second only to van den Bos in output, publishing nearly 20,000
means (based on some 54,000 measures, 47,500 by micrometry and 6,500 by photography) and
discovering 918 new pairs over a career spanning half a century. He remains the largest
contributor of "preferred" orbits to the Sixth Catalog of Visual Binary Stars; the (incomplete)
database for that catalog includes an astounding 748 sets of his orbital elements. The Sixth
Catalog itself is a direct descendant of the Fourth Orbit Catalog, published by Wulff and
Charles Worley in 1983 and a standard reference for 17 years. Finally, Wulff's book "Double Stars"
(originally published in German under the title "Dopplesterne") remains the bible for many of us
in the field, 35 years after its publication.
Born in Wursburg, Germany, Wulff began his work in astromety at the University of Munich, and
began specializing in the field of double stars very early in his career; his first doublestar-
related publication (fittingly, orbits of four visual binaries) was published in 1954. He joined
the faculty of Swarthmore College (Swarthmore, Pennsylvania) in 1967, where he remained a popular
lecturer and indefatigable observer until his retirement in 1998. Known for the utmost care in his
observing and the sparest of prose in his writing, he remained active in astronomy even as an
emeritus professor; the final publication bearing his name was a poster presented this past
January at the American Astronomical Society meeting in Washington. His was truly a remarkable
career.
I'm sure the thoughts of many of us will be with Wulff's family.
William Hartkopf
U.S. Naval Observatory.
***********************************************************************
The deadline for contributions to Information Circular No. 160 is:
October 15th 2006
J. A. Docobo (oadoco@usc.es)
J. F. Ling (oafana@usc.es)
Tel: +34 981592747
Fax: +34 981597054
Observatorio Astronomico "R. M. Aller"
P. O. Box 197
Universidade de Santiago de Compostela
SPAIN
http://www.usc.es/astro
ISSN: 1024-7769
INTERNATIONAL ASTRONOMICAL UNION COMMISSION 26 (DOUBLE STARS)
INFORMATION CIRCULAR No. 160 (OCTOBER 2006)
NEW ORBITS
ADS Name P (yr) T e W(2000) 2006 Author
RA 2000 DEC n (deg) a (") i (deg) w (deg) Last ob. 2007
---------------------------------------------------------------------------------------
30 CHR 122Aa 70.12 2050.07 0.515 100.6 344.2 0.067 NOVAKOVIC
00046+4206 5.1339 0.165 104.8 295.1 1996.5378 337.8 0.072
440 GL 22Aa 15.64 2000.76 0.174 175.1 49.1 0.443 DOCOBO &
00321+6715 23.0179 0.511 44.6 106.8 2004.9902 71.8 0.424 TAMAZIAN
440 GL 22Aa-B 222.3 2081.84 0.296 174.7 174.9 4.001 DOCOBO
00321+6715 1.6194 3.310 47.3 146.2 2005.8029 175.6 3.984 et al. (*)
2756 BU 1003 286.34 1997.42 0.479 81.7 222.6 1.083 NOVAKOVIC
03454-2752 1.2572 2.145 34.7 101.7 2001.8623 226.1 1.110
2921 HU 29 123.98 1939.63 0.879 135.8 311.9 0.434 CVETKOVIC
03596-1019 2.9036 0.234 64.5 349.3 1997.030 312.1 0.434
2928 A 1937 42.32 1972.75 0.859 149.9 65.8 0.108 BRENDLEY &
04008+0505 8.5066 0.126 53.3 75.4 1995.9321 69.6 0.102 HARTKOPF
2959 STF 483 495.65 1909.98 0.706 190.2 58.4 1.375 BRENDLEY
04041+3931 0.7263 2.482 110.8 321.1 2003.053 57.8 1.393 & MASON
3326 A 1840AB 163.5 1840.71 0.436 79.4 14.6 0.103 BRENDLEY &
04362+0814 2.2018 0.220 143.4 58.2 1996.869 7.3 0.103 HARTKOPF
3358 STF 566AB-C 480.75 2027.79 0.229 110.8 183.9 0.759 CVETKOVIC
04400+5328 0.7488 1.514 128.4 307.1 2005.090 182.1 0.763
- HJ 3683 326.17 1919.36 0.95 263.6 89.8 3.546 BRENDLEY
04403-5857 1.1037 2.435 100.9 338.1 2002.704 89.8 3.567 & MASON
- I 342 868.05 2743.45 0.915 74.6 135.0 3.094 NOVAKOVIC
04496-5353 0.4147 3.827 127.0 127.3 2001.8734 134.9 3.110
3610 A 2629 141.0 1958.27 0.803 103.1 190.5 0.146 SCARDIA
05010-1112 2.5531 0.192 117.1 102.4 1996.863 189.3 0.148 et al. (**)
4236 A 1564 181.7 1845.8 0.207 160.8 157.0 0.199 BRENDLEY &
05394+4343 1.9813 0.232 71.0 50.6 1997.1254 157.9 0.199 HARTKOPF
5092 B 114 60.11 1977.75 0.584 118.9 354.7 0.592 CVETKOVIC
06274-2544 5.9892 0.430 34.2 64.2 1996.8987 356.9 0.590
6454 STF1157 1448. 2002.98 0.443 64.7 185.8 0.715 LING
07546-0248 0.2486 1.827 130.2 246.6 2003.53 184.8 0.711
6796 HU 856 80.59 1948.61 0.534 3.9 306.9 0.238 CVETKOVIC
08254+3723 4.4669 0.227 42.9 85.2 1992.2199 309.4 0.236
7334 A 1342 51.57 1949.56 0.090 26.5 196.7 0.145 RICA
09228-0950 6.9808 0.169 68.6 115.1 1996.1783 200.0 0.153
8311 BU 603 136.0 1941.11 0.808 255.8 337.8 1.078 BRENDLEY
11486+1417 2.6471 0.702 148.0 98.3 2005.34 337.2 1.079 & MASON
8485 HU 736 245.47 1949.77 0.427 275.9 193.0 0.305 BRENDLEY &
12160+4807 1.4666 0.305 153.4 314.7 1997.4 191.8 0.308 HARTKOPF
9094 BU 1270 38.74 1989.96 0.435 116.6 320.7 0.269 BRENDLEY
14037+0829 9.2916 0.195 26.6 40.3 2003.476 324.6 0.270 & MASON
- COU 606 25.91 2010.57 0.347 48.3 339.4 0.151 DOCOBO
14138+3059 13.8943 0.183 147.5 175.8 2005.5179 321.2 0.134 & LING
9654 A 2175 218.14 1495.5 0.500 177.6 204.7 0.257 BRENDLEY
15282+0251 1.6503 0.263 65.5 254.4 1998.446 205.4 0.256 & MASON
9747 A 2176 53.74 1987.58 0.703 100.0 180.0 0.206 BRENDLEY
15420+0027 6.6988 0.158 34.6 276.3 2001.5638 182.2 0.209 & MASON
10007 A 225 43.34 2005.90 0.489 117.5 295.1 0.066 ANDRADE
16198+2646 8.3064 0.129 114.4 183.1 2005.5179 282.6 0.060
- CHR 55 62.79 1990.01 0.648 177.4 130.0 0.066 BRENDLEY &
16254+3724 5.7334 0.321 96.5 292.3 1997.1266 116.6 0.057 HARTKOPF
10404 BAR 7 428.12 2216.98 0.186 170.0 62.3 1.571 NOVAKOVIC
17141-0824 0.8409 2.265 124.5 278.4 1997.5800 61.4 1.577
10899 A 2189 154.5 1976.35 0.496 153.3 254.2 0.074 DOCOBO &
17563+0259 2.3301 0.218 71.7 327.6 2005.5235 259.5 0.077 TAMAZIAN
11071 HU 1186 104.3 1925.94 0.401 281.2 116.2 0.244 BRENDLEY
18063+3824 3.4516 0.32 76.3 355.8 2000.54 117.5 0.228 & MASON
11071 HU 1186 112.41 1932.38 0.466 99.2 113.5 0.300 CVETKOVIC
18063+3824 3.2025 0.295 74.5 199.5 2000.540 114.2 0.291
11584 STT 363 405. 1986.20 0.872 159.5 342.8 0.417 ALZNER
18374+7741 0.8889 0.735 76.8 61.6 2005.76 343.1 0.429
11574 A 2988 57.09 1941.38 0.694 321.3 253.9 0.090 RICA
18410+2450 6.3058 0.103 153.3 297.7 1995.6007 249.0 0.097
11692 HU 937 225.53 1678.60 0.800 166.8 330.9 0.959 BRENDLEY
18462+6412 1.5962 0.997 80.1 304.4 2003.691 331.1 0.967 & MASON
12145 SE 2BC 62.79 1956.62 0.496 271.5 63.6 0.289 BRENDLEY &
19111+3847 5.7334 0.379 113.4 4.6 2001.4989 59.8 0.260 HARTKOPF
12552 A 712 95.41 1972.92 0.567 98.6 81.1 0.120 BRENDLEY
19302+5639 3.7732 0.177 99.0 263.0 1996.6903 80.0 0.116 & MASON
12552 A 712 99.08 1972.96 0.557 98.2 81.6 0.132 CVETKOVIC
19302+5639 3.6336 0.180 99.7 262.2 1996.6903 80.7 0.128
- CHR 90 60.14 2001.65 0.770 73.5 258.2 0.185 CVETKOVIC
19531-1436 5.9857 0.268 137.1 51.2 1996.532 253.1 0.213
- COU1962 33.13 1979.57 0.189 109.9 69.6 0.096 DOCOBO
20311+3333 10.8663 0.213 71.5 25.0 2005.5179 83.0 0.119 & LING
15236 HU 280 170.43 1794.63 0.054 315.1 352.5 0.180 BRENDLEY &
21423+0555 2.1123 0.214 46.3 315.3 2000.5 354.6 0.178 HARTKOPF
15251 BU 688 AB 110.67 1948.42 0.979 185.2 201.0 0.435 BRENDLEY &
21426+4103 3.2529 0.394 100.4 122.1 2004.21 200.9 0.436 HARTKOPF
16164 HO 188 193.15 2024.44 0.219 219.5 221.3 0.360 BRENDLEY
22402+3732 1.8638 0.430 69.4 57.4 2002.764 222.2 0.356 & MASON
(*) DOCOBO, TAMAZIAN & CAMPO
(**) SCARDIA, PRIEUR, PANSECCHI & ARGYLE
---------------------------------------------------------------------------------------------------
Summary of Prague Business Meeting
W.I. Hartkopf, USNO
This is a summary of the business meeting of Commission 26, which took place on 17 August 2006,
during the XXVIth IAU General Assembly in Prague. It was chaired by its outgoing president,
W. Hartkopf, and was attended by the following: H. Abt, C. Allen, W. van Altena, R. Argyle,
G. van Belle, D. Bisikalo, A. Bradley, T. ten Brummelaar, T. Corbin, R. Costero, J. Davis,
H. Dickel, J. A. Docobo, J. Echevarria, F. Fekel, E. Griffin, P. Harmanec, W. Hartkopf, P. Lampens,
O. Malkov, B. Mason, H. McAlister, T. Oswalt, D. Pourbaix, A. Poveda, D. Raghavan, W. Sanders,
C. Scarfe, W. Tango, A. Tokovinin, S. Urban, R. Wilson, and H. Zinnecker.
W. Hartkopf started with a report on events during the past triennium. He announced the deaths,
during that period, of members G. Douglass, W. Heintz, and R. Walker and the meeting observed a few
moments of silence in their memory.
The Commission then welcomed the following 26 new members:
J. Ahumada (Argentina), C. Bailyn (USA), Z. Cvetkovic (Serbia),
R. Dukes, Jr. (USA), V. Elkin (United Kingdom), L. Freyhammer (United Kingdom),
S. Goodwin (UK), T. Hillwig (USA), L. Kazantseva (Ukraine),
L. Kisseleva-Eggleton (USA), S. Kitsionas (Germany), W. Kley (Germany),
J. Lim (China Taipei), Y. Lyubchik (Ukraine), V. Marsakova (Ukraine),
D. McDavid (USA), M. Mikolajewski (Poland), I. Negueruela (Spain),
R. Neuhaeusen (Germany), D. Nurnberger (Chile), V. Orlov (Russia),
M. Petr-Gotzens (Germany), D. Pollacco (UK), L. Roberts, Jr. (USA),
A. Smith (USA), and A. Zheleznyak (Ukraine).
This brings the total membership of Commission 26 to 151, from 35 countries.
The chairman then reported on the recent election, in which just over half the membership voted. For
the period 2006 to 2009, the president will be C. Allen, and the vice-president, J.A. Docobo. The OC
will be made up of new members Y. Balega, B. Mason, D. Pourbaix, and C. Scarfe, along with
continuing members J. Davis, E. Oblak and T. Oswalt. Four new OC members were added rather than the
usual three, due to a tie in the vote.
W. Hartkopf gave a short summary of developments at the Commission's website, and invited
suggestions for further improvements. J.A. Docobo then gave a report on Commission 26 circulars.
Andrei Tokovinin gave a brief account of the ESO workshop "Multiple Stars across the H-R Diagram",
held July 2005 in Munich. Announcements were then made of upcoming meetings, including IAU
Symposium 240 ("Binary Stars as Critical Tools and Tests in Contemporary Astrophysics"), to be held
later during the Prague GA, and Symposium 248 ("A Giant Step: from Milli- to Micro-arcsecond
Astrometry"), to be held 15-19 October 2007 in Shanghai.
Reports on catalogues and journals followed, including the USNO CD-ROM 2006.5 (Hartkopf), the Ninth
Spectroscopic Orbit Catalog (Pourbaix), the Multiple Stars Catalog (Tokovinin), the Catalogue of
Orbits and Ephemerides of Visual Double Stars (Docobo), and the Catalogue of Eclipsing Binaries
(Malkov).
R. Argyle followed with a discussion of amateur projects in double-star measurement, including the
efforts of the French Astronomical Society, the Webb Society, the new electronic Journal of Double
Star Observations, the Spanish/South American LIADA group, and Garraf Observatory in Spain. Amateurs
are reponsible for over 1/3 of the measures added to the WDS during the past 6 years, and many of
these measures are of quite high quality. Argyle highlighted some of the major amateur observers,
their equipment, and examples of their observations. He ended his talk with a plea encouraging
observers to work in the long-neglected southern hemisphere.
Reports were given on various observing facilities and programs, including the speckle programs of
Calar Alto (Docobo), the USNO (Mason), PISCO (Argyle), and RYTSI/WIYN (van Altena). T. ten
Brummelaar gave an update on the CHARA Array, which is now operating with six 1-meter telescopes
over a 350-m baseline.
The business portion of the meeting then concluded with an outline of plans for the next triennium,
by incoming president C. Allen.
Following a break, the science portion of the Commission meeting was comprised of six interesting
talks:
- Theo ten Brummelaar: The use of an outlying star as a calibrator for close pairs in
interferometry;
- Rafael Costero: A new SB in the Trapezium;
- Jose Docobo: The coplanarity of visual orbits in the triple system of red dwarfs Gliese 22;
- Elizabeth Griffin: The Binary Star Gamma Persei: Bright, but Ill-understood... ;
- Patricia Lampens: The Hyades binary theta 2 Tau;
- Brian Mason: Double Stars and the Terrestrial Planet Finder Mission.
The meeting then adjourned to the steps of the Congress Centre for a group photo.
---------------------------------------------------------------------------------------------------
NOTES
Others papers on double stars published in 2005:
DOMMANGET, J.: "Les elements orbitaux des etoiles doubles visuelles. Leurs definitions, notions peu
ou tres mal connues..", L'Astronomie 119, 248-250 (2005)
***************************************************************************************************
The deadline for contributions to Information Circular No. 161 is:
February 15th 2007
J. A. Docobo (oadoco@usc.es)
J. F. Ling (oafana@usc.es)
Tel: +34 981592747
Fax: +34 981597054
Observatorio Astronomico "R. M. Aller"
P. O. Box 197
Universidade de Santiago de Compostela
SPAIN
http://www.usc.es/astro
ISSN: 1024-7769