HD 88955
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 10h 14m 14 44.1579s[1] |
| Declination | −42° 07′ 18.9852″[1] |
| Apparent magnitude (V) | 3.85[2] |
| Characteristics | |
| Spectral type | A2 V[2] |
| B−V color index | +0.051±0.005[3] |
| Astrometry | |
| Radial velocity (Rv) | +7.4±2.7[4] km/s |
| Proper motion (μ) | RA: −151.532[1] mas/yr Dec.: +49.171[1] mas/yr |
| Parallax (π) | 32.7054 ± 0.3218 mas[1] |
| Distance | 99.7 ± 1.0 ly (30.6 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.39[3] |
| Details | |
| Mass | 2.17[5] M☉ |
| Radius | 2.11[5] R☉ |
| Luminosity | 23.24[5] L☉ |
| Surface gravity (log g) | 4.08±0.14[6] cgs |
| Temperature | 9,451±321[6] K |
| Metallicity [Fe/H] | −0.02[7] dex |
| Rotational velocity (v sin i) | 100±4[8] km/s |
| Age | 410[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 88955 is a single,[10] 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.[2] The distance to HD 88955 can be determined from its annual parallax shift of 32.7 mas,[1] which yields a separation of 100 light years from the Sun. It is moving further from the Earth with a heliocentric radial velocity of +7 km/s.[4] Bayesian analysis suggests HD 88955 is a member of the Argus Association,[11] a group of co-moving stars usually associated with the IC 2391 open cluster.
This is an A-type main-sequence star with a stellar classification of A2 V.[2] It is about 410[5] million years old with a projected rotational velocity of 100 km/s.[8] The star has 2.17[5] times the mass of the Sun and 2.11[5] times the Sun's radius. It is radiating 23[5] times the Sun's luminosity from its photosphere at an effective temperature of 9,451 K.[6] 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.[12]
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