HD 88955
Star in the constellation Vela
From Wikipedia, the free encyclopedia
HD 88955 is a single,[11] white-hued star in the southern constellation of Vela. It can be viewed with the naked eye, having an apparent visual magnitude of 3.85.[3] The distance to HD 88955 can be determined from its annual parallax shift of 31.6 mas,[2] which yields a distance of 103 light years from the Sun. It is moving further from the Earth with a heliocentric radial velocity of +7 km/s.[5] Bayesian analysis suggests HD 88955 is a member of the Argus Association,[12] a group of co-moving stars usually associated with the IC 2391 open cluster.
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela[1] |
| Right ascension | 10h 14m 44.1557s[2] |
| Declination | −42° 07′ 18.989″[2] |
| Apparent magnitude (V) | 3.85[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A2 V[3] |
| B−V color index | +0.051±0.005[1] |
| Astrometry | |
| Radial velocity (Rv) | +7.4±2.7[5] km/s |
| Proper motion (μ) | RA: −149.929[2] mas/yr Dec.: +49.548[2] mas/yr |
| Parallax (π) | 31.6369±0.1684 mas[2] |
| Distance | 103.1 ± 0.5 ly (31.6 ± 0.2 pc) |
| Absolute magnitude (MV) | 1.39[1] |
| Details | |
| Mass | 2.17[6] M☉ |
| Radius | 2.11[6] R☉ |
| Luminosity | 23.24[6] L☉ |
| Surface gravity (log g) | 4.08±0.14[7] cgs |
| Temperature | 9,451±321[7] K |
| Metallicity [Fe/H] | −0.02[8] dex |
| Rotational velocity (v sin i) | 100±4[9] km/s |
| Age | 410[6] Myr |
| Other designations | |
| q Velorum, CD−41°5713, FK5 382, GC 14076, HD 88955, HIP 50191, HR 4023, SAO 221895[10] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A2 V.[3] It is about 410 million years old[6] with a projected rotational velocity of 100 km/s.[9] The star has 2.17 times the mass of the Sun[6] and 2.11 times the Sun's radius.[6] It is radiating 23 times the Sun's luminosity[6] from its photosphere at an effective temperature of 9,451 K.[7] An infrared excess has been detected from HD 88955, which analysis suggests is a (3.6±3.0)×10−7 M🜨 debris disc with a mean temperature of 138±21 K orbiting the host star at an average distance of 19.3±5.7 AU.[13]