V344 Carinae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 08h 46m 42.54928s |
| Declination | −56° 46′ 11.1922″ |
| Apparent magnitude (V) | 4.50 (4.40–4.51) |
| Characteristics | |
| Spectral type | B3V(n) |
| B−V color index | −0.169±0.008 |
| Variable type | Be |
| Astrometry | |
| Radial velocity (Rv) | +27.0±7.4 km/s |
| Proper motion (μ) | RA: −9.29 mas/yr Dec.: +8.85 mas/yr |
| Parallax (π) | 5.39±0.14 mas |
| Distance | 610 ± 20 ly (186 ± 5 pc) |
| Absolute magnitude (MV) | −1.84 |
| Details | |
| Mass | 7.1±0.1 M☉ |
| Radius | 3.00±0.06 R☉ |
| Luminosity | 2,328+120 −105 L☉ |
| Surface gravity (log g) | 3.79±0.18 cgs |
| Temperature | 17,660±560 K |
| Rotational velocity (v sin i) | 268±18 km/s |
| Age | 31.6±3.9 Myr |
| Other designations | |
| f Car, V344 Car, CPD−56°1865, FK5 2695, GC 12138, HD 75311, HIP 43105, HR 3498, SAO 236268 | |
| Database references | |
| SIMBAD | data |
V344 Carinae is a single 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. Historically, it was mentioned in the Almagest, suggesting that some time around 130 BCE it was brighter than its current magnitude. This object is located at a distance of approximately 610 light-years from the Sun based on parallax. The star is drifting further away with a radial velocity of around +27 km/s.
This is a B-type main-sequence star with a stellar classification of B3V(n). It is a Be star; a rapidly rotating star that is hosting a circumstellar disk of hot, decreted gas. In 1951, Alan William James Cousins announced his discovery that the star, then known as f Carinae, is a photometrically variable star. It was given its variable star designation in 1975. Its brightness ranges from 4.4 down to 4.51 in visual magnitude, and it has been classified as a Gamma Cassiopeiae variable. The star is 32 million years old and is spinning with a projected rotational velocity of 268 km/s. It has seven times the mass of the Sun and around 3.0 times the Sun's radius. The star is radiating 2,328 times the luminosity of the Sun from its photosphere at an effective temperature of 17,660 K.