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  tau CMa  
000-BBM-895 (203 observations)  
Canis Major Sequence
07 18 42.49 -24 57 15.8  (109.67704 -24.95439) Search nearby
B1950.0 07 16 38.04 -24 51 42.8
Proper motion
RA: -2.31 +/- 0.40 mas/yDec: 5.02 +/- 0.55 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 238.181 -5.543
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
30 CMa 1RXS J071841.7-245707 AAVSO 0714-24
ADS 5977 A CD-24 5176 CPD-24 2216
HD 57061 HIP 35415 HR 2782
NSV 3528 SAO 173446 X 07166-249
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Variability type
Spectral type B0.5V+B0.5V
Mag. range
4.38 - 4.44 V
Discoverer --
01 Sep 1991 (HJD 2448501.102) Ephemeris
Outburst --
Period 1.28214 d
Rise/eclipse dur. --
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1 Otero, Sebastian Alberto Aa is a hierarchical O9 II+(B0.5V+B0.5V) triple system with P= 154.9 d. (Magnitudes 5.18, 7.45 and 7.45 V respectively). Additional known components at 0.12" (Ab, O9V, V= 5.38) and 0.95" (E) (2014ApJS..215...15S). Combined range given.
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1 Sana, H.; et al., 2014, Southern Massive Stars at High Angular Resolution:
Observational Campaign and Companion Detection
2 European Space Agency, 1997, The Hipparcos and Tycho Catalogues, ESA
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 4.76H = 4.77K = 4.79J - K = -0.02
AllWISE W1 = 4.71W2 = 4.51W3 = 4.72W4 = 4.53W1 - W2 = 0.20W3 - W4 = 0.20
Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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Stellar Association Membership
 NGC 2362 Open Cluster 2012A&A...548A..97Z
Revision History
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4 Otero, Sebastian Alberto 2016-04-02 18:53 UTC Range from HIPPARCOS and GCPD data. Spectral type from 2014ApJS..215...15S.
3 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 15:52 UTC Added period, epoch and spectral type from [1997yCat.1239....0E].
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.