Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Carina |
Right ascension | 08h 35m 15.55393s[1] |
Declination | −58° 13′ 29.0544″[1] |
Apparent magnitude (V) | 5.25 + 8.90[2] |
Characteristics | |
Spectral type | B4V[3] |
B−V color index | −0.133±0.005[4] |
Astrometry | |
Radial velocity (Rv) | 21.0±4.2[4] km/s |
Proper motion (μ) | RA: -21.280[1] mas/yr Dec.: +11.230[1] mas/yr |
Parallax (π) | 3.7340 ± 0.1418 mas[1] |
Distance | 870 ± 30 ly (270 ± 10 pc) |
Absolute magnitude (MV) | −1.91[4] |
Details | |
A | |
Mass | 7.0±0.4[5] M☉ |
Radius | 3.9[6] R☉ |
Luminosity | 1159.86[4] L☉ |
Surface gravity (log g) | 4.5[7] cgs |
Temperature | 16,571±306[8] K |
Rotational velocity (v sin i) | 155[8] km/s |
Age | 36.1±11.0[5] Myr |
B | |
Mass | 0.9+0.04 −0.02[7] M☉ |
Temperature | 5,241±158[7] K |
Metallicity [Fe/H] | -0.5[7] dex |
Rotational velocity (v sin i) | 10[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 73390, also called e1 Carinae, is a binary star[2] system in the constellation Carina. It is approximately 870 light years from Earth. The primary is a blue-white B-type main sequence dwarf with an apparent magnitude of +5.27. It displays an infrared excess and is a candidate host of an orbiting debris disk.[10] The secondary is a magnitude 8.9 star which has a mass and temperature similar to the Sun.