HD 73390
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 08h 35m 15.55393s |
| Declination | −58° 13′ 29.0544″ |
| Apparent magnitude (V) | 5.25 + 8.90 |
| Characteristics | |
| Spectral type | B4V |
| B−V color index | −0.133±0.005 |
| Astrometry | |
| Radial velocity (Rv) | 21.0±4.2 km/s |
| Proper motion (μ) | RA: -21.280 mas/yr Dec.: +11.230 mas/yr |
| Parallax (π) | 3.7340±0.1418 mas |
| Distance | 870 ± 30 ly (270 ± 10 pc) |
| Absolute magnitude (MV) | −1.91 |
| Details | |
| A | |
| Mass | 7.0±0.4 M☉ |
| Radius | 3.9 R☉ |
| Luminosity | 1159.86 L☉ |
| Surface gravity (log g) | 4.5 cgs |
| Temperature | 16,571±306 K |
| Rotational velocity (v sin i) | 155 km/s |
| Age | 36.1±11.0 Myr |
| B | |
| Mass | 0.9+0.04 −0.02 M☉ |
| Temperature | 5,241±158 K |
| Metallicity [Fe/H] | -0.5 dex |
| Rotational velocity (v sin i) | 10 km/s |
| Other designations | |
| e01 Car, BD−57°1590, GC 11796, HD 73390, HIP 42129, HR 3415, SAO 236105, CCDM J08353-5813, WDS J08353-5813 | |
| Database references | |
| SIMBAD | data |
HD 73390, also called e1 Carinae, is a binary star 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. The secondary is a magnitude 8.9 star which has a mass and temperature similar to the Sun.