Omega2 Aquarii
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 42m 43.34473s[1] |
| Declination | −14° 32′ 41.6523″[1] |
| Apparent magnitude (V) | 4.49[2] |
| Characteristics | |
| Spectral type | B9 V[3] |
| U−B color index | −0.12[2] |
| B−V color index | −0.04[2] |
| Absolute magnitude (MV) | +1.20[5] |
| Details | |
Rotational velocity (v sin i) | 148[7] km/s |
SAO 165842[8] | |
| Database references | |
| SIMBAD | data |
Omega2 Aquarii,
apparent visual magnitude of 4.49.[2] The approximate distance to this star, 149 light-years (46 parsecs), is known from parallax measurements taken during the Hipparcos mission.[1]
The primary component of this system is a massive,
B-type star.[10]
There is a close orbiting stellar companion of unknown type, with a third component at an
arcseconds. The latter is a K-type main-sequence star with a visual magnitude of 9.5.[9] This system is among the 100 strongest stellar X-ray sources within 163 light-years (50 parsecs) of the Sun. It is emitting an X-ray luminosity of 1.2 × 1030 erg s−1.[11]
References
- ^ S2CID 18759600.
- ^ Bibcode:1978A&AS...34....1N.
- ^ Bibcode:1988mcts.book.....H.
- Bibcode:1953GCRV..C......0W.
- ^ S2CID 119257644.
- ^ S2CID 119512018.
- ^ S2CID 18475298.
- Centre de Données astronomiques de Strasbourg, retrieved 2008-05-16.
- ^ S2CID 14878976.
- Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the originalon March 18, 2012, retrieved 2012-01-16.
- doi:10.1086/378164.
External links
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