Omega Carinae

ω Carinae
Location of ω Carinae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 10h 13m 44.21739s[1]
Declination –70° 02′ 16.4563″[1]
Apparent magnitude (V) 3.29[2]
Characteristics
Spectral type B8 IIIe[3]
U−B color index –0.285[4]
B−V color index –0.083[4]
Astrometry
Radial velocity (Rv)+7.0[2] km/s
Proper motion (μ) RA: -36.01[1] mas/yr
Dec.: +7.09[1] mas/yr
Parallax (π)9.54 ± 0.09 mas[1]
Distance342 ± 3 ly
(104.8 ± 1.0 pc)
Absolute magnitude (MV)−1.81[5]
Details
Radius7.20±0.14[6] R☉
Luminosity918[7] L☉
Surface gravity (log g)3.51[7] cgs
Temperature11,630[7] K
Rotational velocity (v sin i)240[7] km/s
Other designations
ω Car, CD−69°1178, FK5 385, HD 89080, HIP 50099, HR 4037, SAO 250885[8]
Database references
SIMBADdata

Omega Carinae, Latinized from ω Carinae, is a star in the constellation Carina. With a declination greater than 70 degrees south of the celestial equator, it is the most southerly of the bright stars of Carina (third-magnitude or brighter), and it is part of a southern asterism known as the Diamond Cross. This star has an apparent visual magnitude of 3.3 and is located at a distance of about 342 light-years (105 parsecs) from Earth.

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