Omicron Andromedae
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| Observation data Equinox J2000.0 |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 01m 55.3s |
| Declination | +42° 19' 34" |
| Apparent magnitude (V) | +3.62 |
| Distance | 692 ± 99 ly (212 ± 30 pc) |
| Spectral type | B6IIIpe+A2p |
| Other designations | |
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.
[edit] Location
This star's location in the constellation Andromeda can be seen in the following diagram:
{{var-star-stub}
