V372 Carinae
Star in the constellation Carina
From Wikipedia, the free encyclopedia
V372 Carinae is a single[12] star in the southern constellation of Carina. Located around 1,350 light-years distant. It shines with a luminosity approximately 4,236 times that of the Sun and has a surface temperature of 21,429 K.[8] It is a Beta Cephei variable.[7] A magnitude 5.7 star, it will be faintly visible on moonless nights to the naked eye of a person located far from city lights.
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Carina[2] |
| Right ascension | 07h 52m 29.74164s[3] |
| Declination | −54° 22′ 01.7889″[3] |
| Apparent magnitude (V) | 5.70[2] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | B2V[5][2][6] |
| B−V color index | −0.151±0.004[2] |
| Variable type | Beta Cephei[7] |
| Astrometry | |
| Radial velocity (Rv) | +18.0±4.3[2] km/s |
| Proper motion (μ) | RA: −4.642[3] mas/yr Dec.: +8.605[3] mas/yr |
| Parallax (π) | 2.4079±0.0633 mas[3] |
| Distance | 1,350 ± 40 ly (420 ± 10 pc) |
| Absolute magnitude (MV) | −2.35[2] |
| Details | |
| Mass | 8.3[8] M☉ |
| Radius | 6.97[3] R☉ |
| Luminosity | 4,236[8] L☉ |
| Surface gravity (log g) | 3.65[3] cgs |
| Temperature | 21,429[8] K |
| Rotational velocity (v sin i) | 155[9] km/s |
| Age | 15.8±2.2[10] Myr |
| Other designations | |
| V372 Car, CD−54°1966, HD 64722, HIP 38438, HR 3088, SAO 235579[11] | |
| Database references | |
| SIMBAD | data |
In 1977, Mikołaj Jerzykiewicz and Christiaan Sterken announced their discovery that the star is variable.[13] It was given its variable-star designation, V372 Carinae, in 1981.[14] The brightness of V372 Carinae varies by up to three hundredths of a magnitude with a fairly regular period of 2.8 hours.[15]