V344 Carinae is a single[11] star in the southern constellation of Carina. It has the Bayer designation f Carinae, while V344 Carinae is its variable star designation. This star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around 4.50.[3] Historically, it was mentioned in the Almagest, suggesting that some time around 130 BCE it was brighter than its current magnitude.[12] This object is located at a distance of approximately 610 light-years from the Sun based on parallax.[2] The star is drifting further away with a radial velocity of around +27 km/s.[3]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Carina |
Right ascension | 08h 46m 42.54928s[2] |
Declination | −56° 46′ 11.1922″[2] |
Apparent magnitude (V) | 4.50[3] (4.40–4.51)[4] |
Characteristics | |
Spectral type | B3V(n)[5] |
B−V color index | −0.169±0.008[3] |
Variable type | Be[6] |
Astrometry | |
Radial velocity (Rv) | +27.0±7.4[3] km/s |
Proper motion (μ) | RA: −9.29[2] mas/yr Dec.: +8.85[2] mas/yr |
Parallax (π) | 5.39 ± 0.14 mas[2] |
Distance | 610 ± 20 ly (186 ± 5 pc) |
Absolute magnitude (MV) | −1.84[3] |
Details | |
Mass | 7.1±0.1[7] M☉ |
Radius | 3.00±0.06[8] R☉ |
Luminosity | 2,328+120 −105[9] L☉ |
Surface gravity (log g) | 3.79±0.18[9] cgs |
Temperature | 17,660±560[9] K |
Rotational velocity (v sin i) | 268±18[9] km/s |
Age | 31.6±3.9[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a B-type main-sequence star with a stellar classification of B3V(n).[5] It is a Be star; a rapidly rotating star that is hosting a circumstellar disk of hot, decreted gas.[13] It is a photometrically variable Be star, having a brightness that ranges from 4.4 down to 4.51 in visual magnitude, and has been classified as a Gamma Cassiopeiae variable.[4] The star is 32[7] million years old and is spinning with a projected rotational velocity of 268 km/s.[9] It has seven[7] times the mass of the Sun and around 3.0[8] times the Sun's radius. The star is radiating 2,328[9] times the luminosity of the Sun from its photosphere at an effective temperature of 17,660 K.[9]