WRH 37AB
Omicron Andromedae
Omicron Andromedae (ο And / ο Andromedae) is a star system in the constellation Andromeda. It is approximately 692 light years from Earth.
Omicron Andromedae is a binary star, whose two components are both spectroscopic binaries themselves, making a four star system. The system as a whole is classified as a blue-white B-type giant with a mean combined apparent magnitude of +3.62.
The separation of the two brightest components, ο Andromedae A and ο Andromedae B is 0.34 arcseconds. They have an orbital period of 68.6 years. A is separated from its spectroscopic companion by 0.05 arcseconds. A is a Gamma Cassiopeiae type variable star and the system's brightness varies from magnitude +3.58 to +3.78. This, in turn, has made determination the orbital period of A's spectroscopic binary difficult. B's spectroscopic companion was discovered in 1989, and that binary has a period of 33.01 years.
Location
This star's location in the constellation Andromeda can be seen in the following diagram:Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| ο Andromedae a (BLA 12Aa) | 23h 01m 55.2643s | +42° 19' 33.525'' | 3.62 | B6III+A2 | Simbad |
| ο Andromedae B (WRH 37AB) | 3.6 | Simbad |
References
- http://www.alcyone.de/cgi-bin/search.pl?object=HR8762
- Image ο Andromedae
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Last updated on Monday September 08, 2008 at 14:11:08 PDT (GMT -0700)
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