| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 08h 56m 58.41666s [2] |
| Declination | −59° 13′ 45.6032″ [2] |
| Apparent magnitude (V) | 4.69 [3] (4.87 + 6.58) [4] |
| Characteristics | |
| Spectral type | B2V [5] + B9.5V [3] |
| B−V color index | −0.182±0.004 [6] |
| Astrometry | |
| Radial velocity (Rv) | +26.8±2.8 [6] km/s |
| Proper motion (μ) | RA: −8.409±0.406 [2] mas/yr Dec.: +8.421±0.322 [2] mas/yr |
| Parallax (π) | 5.0495±0.1667 mas [2] |
| Distance | 650 ± 20 ly (198 ± 7 pc) |
| Absolute magnitude (MV) | −1.64 [6] |
| Details | |
| A | |
| Mass | 7.8±0.1 [7] M☉ |
| Luminosity (bolometric) | 2,998 [8] L☉ |
| Temperature | 21,150 [8] K |
| Age | 12.5±1.6 [7] Myr |
| Other designations | |
| b1 Car, V376 Carinae, CD−58°1301, FK5 1233, GC 12405, HD 77002, HIP 43937, HR 3582, SAO 236436, CCDM J08570-5914, WDS J08570-5914 [9] | |
| Database references | |
| SIMBAD | data |
V376 Carinae is a binary star [3] system in the southern constellation of Carina. It has the Bayer designation b1 Carinae; V376 Carinae is the variable star designation. The system is visible to the naked eye as a faint point of light with a combined apparent magnitude of +4.69. [3] The distance to this system from the Sun is approximately 650 light years based on parallax. [2] It is drifting further away with a radial velocity of +27 km/s. [6]
The magnitude 4.87 [4] primary, designated component A, is a B-type main-sequence star with a stellar classification of B2V. [5] During a search for Beta Cephei variables in the southern sky, it was initially classed as a very short period variable. [10] However, this variability was not confirmed by subsequent observations. [11] Samus et al. (2017) now suspect it is a constant star that was assigned a variable designation in haste. [12] It has an estimated age of 12.5 million years with 7.8 times the mass of the Sun. [7] The star is radiating nearly three thousand times the Sun's luminosity from its photosphere at an effective temperature of 21,150 K. [8]
The companion star, component B, was discovered by Scottish astronomer James Dunlop in 1836. [4] It has a class of B9.5V [3] with an apparent magnitude of +6.58. As of 2010, the secondary had an angular separation of 40.1″ from the primary along a position angle of 76°. [4]
