V337 Carinae (V337 Car, q Carinae) is a K-type bright giant star in the constellation of Carina. It is an irregular variable and has an apparent visual magnitude which varies between 3.36 and 3.44.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Carina |
Right ascension | 10h 17m 04.9753s[1] |
Declination | −61° 19′ 56.288″[1] |
Apparent magnitude (V) | 3.36 to 3.44[2] |
Characteristics | |
Spectral type | K2.5II[3] |
U−B color index | +1.72[4] |
B−V color index | +1.54[4] |
R−I color index | +0.77[4] |
Variable type | LC[2] |
Astrometry | |
Radial velocity (Rv) | 8.2±0.9[5] km/s |
Proper motion (μ) | RA: −23.922[1] mas/yr Dec.: 6.734[1] mas/yr |
Parallax (π) | 4.3046 ± 0.1345 mas[6] |
Distance | 760 ± 20 ly (232 ± 7 pc) |
Details | |
Mass | 9.0[7] M☉ |
Radius | 128[7] R☉ |
Luminosity | 3,236[7] L☉ |
Surface gravity (log g) | 1.17 - 1.36[7] cgs |
Temperature | 4,118[7] K |
Metallicity [Fe/H] | 0.54[7] dex |
Age | 45.5[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
V337 has a spectral class of K2.5II, indicating a bright giant. It is considered likely to be on the red giant branch of stars fusing hydrogen around an inert helium core.[7] Its limb-darkened angular diameter has been measured using interferometry at 2.4 mas.[11]
V337 Carinae has two companions listed in multiple star catalogues. Both are 13th-magnitude stars, component B 16.9″ and component C 25.9″ away.[12] Component B is a distant background star,[13] while component C is at about the same distance as V337 Carinae.[14]