Omicron Velorum
 
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela |
| Right ascension | 08h 40m 17.58553s[1] |
| Declination | –52° 55′ 18.8002″[1] |
| Apparent magnitude (V) | +3.60[2] (3.57 - 3.63[3]) |
| Characteristics | |
| Spectral type | B3 IV[4] |
| U−B color index | –0.62[2] |
| B−V color index | –0.18[2] |
| Variable type | SPB[3] |
| Astrometry | |
| Proper motion (μ) | RA: –24.42[1] mas/yr Dec.: +34.44[1] mas/yr |
| Parallax (π) | 6.61 ± 0.35[1] mas |
| Distance | 490 ± 30 ly (151 ± 8 pc) |
| Details | |
| Mass | 5.5 ± 0.4[4] M☉ |
| Radius | 4.3 ± 0.7[4] R☉ |
| Luminosity | 1,000[4] L☉ |
| Surface gravity (log g) | 3.91 ± 0.20[4] cgs |
| Temperature | 16,200 ± 700[4] K |
| Rotational velocity (v sin i) | 9 ± 5[4] km/s |
| Other designations | |
Omicron Velorum (ο Vel, ο Velorum) is a star in the constellation Vela. It is the brightest member of the loose naked eye open cluster IC 2391, also known as the ο Velorum Cluster.
Omicron Velorum is a blue-white B-type subgiant with a mean apparent magnitude of +3.60. It is approximately 495 light years from Earth. A slowly pulsating B star, it ranges between magnitudes 3.57 and 3.63 over 2.8 days.[3]
References
- 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
- 1 2 3 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode:1966CoLPL...4...99J
- 1 2 3 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S 1. Bibcode:2009yCat....102025S.
- 1 2 3 4 5 6 7 Hubrig, S.; et al. (January 2009), "New magnetic field measurements of beta Cephei stars and Slowly Pulsating B stars", Astronomische Nachrichten 330 (4): 317, arXiv:0902.1314, Bibcode:2009AN....330..317H, doi:10.1002/asna.200811187
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