HD 89890
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 10h 20m 54.77319s |
| Declination | −56° 02′ 35.5728″ |
| Apparent magnitude (V) | 4.50 |
| Characteristics | |
| Spectral type | B3 III + A0 IVpSi + A2 + K0 III |
| B−V color index | −0.102±0.014 (A + B) |
| Astrometry | |
| Radial velocity (Rv) | +10.4±2.8 km/s |
| Proper motion (μ) | RA: −7.5 mas/yr Dec.: +4.0 mas/yr |
| Parallax (π) | 2.6564±0.2314 mas |
| Distance | 1,200 ± 100 ly (380 ± 30 pc) |
| Absolute magnitude (MV) | −3.21 (A + B) |
| Details | |
| A (HD 89890) | |
| Radius | 10.07±0.20 R☉ |
| Luminosity | 3,082.41 L☉ |
| Surface gravity (log g) | 3.00±0.03 cgs |
| Temperature | 15,000±150 K |
| Rotational velocity (v sin i) | 26.8±0.5 km/s |
| Other designations | |
| WDS J10209-5603 | |
| A+B: CPD−55 3286, HIP 50676, HR 4074 | |
| A: J Velorum, MV Velorum, HD 89890, SAO 237959, TYC 8604-975-1 | |
| B: SAO 237960, TYC 8604-2444-1 | |
| C: CD−55 3306, SAO 237958, TYC 8604-2137-1 | |
| Database references | |
| SIMBAD | HD 89890 (A) |
| HIC 50676 (A+B) | |
| TYC 8604-2444-1 (B) | |
| CD-55 3306 (C) | |
HD 89890 is the brightest member of a multiple star system with at least four components, located in the southern constellation of Vela. It is visible to the naked eye with an apparent visual magnitude of 4.50. The annual parallax shift of 2.6 mas provides a distance estimate of around 1,200 light-years (370 parsecs). It is moving further away from Earth with a heliocentric radial velocity of +10 km/s.