Omicron1 Canis Majoris
Variable star in the constellation Canis Major / From Wikipedia, the free encyclopedia
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Omicron1 Canis Majoris (ο1 CMa, ο1 Canis Majoris) is a red supergiant star in the constellation Canis Major. It is also a variable star.
For other stars with this Bayer designation, see ο Canis Majoris.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Canis Major |
Right ascension | 06h 54m 07.95237s[1] |
Declination | −24° 11′ 03.1597″[1] |
Apparent magnitude (V) | 3.87[2] (3.78 - 3.99[3]) |
Characteristics | |
Spectral type | K2.5 Iab[4] |
U−B color index | +1.99[2] |
B−V color index | +1.73[2] |
Variable type | Lc[3] |
Astrometry | |
Radial velocity (Rv) | +36.3[5] km/s |
Proper motion (μ) | RA: −4.479[6] mas/yr Dec.: 4.503[6] mas/yr |
Parallax (π) | 2.54 ± 0.36 mas[6] |
Distance | approx. 1,300 ly (approx. 390 pc) |
Absolute magnitude (MV) | −4.69[4] |
Details | |
Mass | 7.83 ± 2.0[7] M☉ |
Radius | 212[1] R☉ |
Luminosity (bolometric) | 10,280 - 10,570[1] L☉ |
Surface gravity (log g) | 0.6[4] cgs |
Temperature | 4,015±170[1] K |
Metallicity [Fe/H] | −0.11[8] dex |
Rotational velocity (v sin i) | 12.31[9] km/s |
Age | 18[10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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