Phi Velorum
Star in the constellation Vela From Wikipedia, the free encyclopedia
Phi Velorum (φ Vel, φ Velorum) is a star in the constellation Vela. It is a blue-white B-type supergiant with an apparent magnitude of +3.53. It is approximately 1,590 light years from Earth.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 56m 51.742s[1] |
| Declination | −54° 34′ 04.04″[1] |
| Apparent magnitude (V) | 3.53[2] |
| Characteristics | |
| Spectral type | B5 Ib[3] |
| U−B color index | −0.62[2] |
| B−V color index | −0.08[2] |
| Astrometry | |
| Radial velocity (Rv) | 13.9[4] km/s |
| Proper motion (μ) | RA: −13.08 ± 0.10[1] mas/yr Dec.: 3.55 ± 0.10[1] mas/yr |
| Parallax (π) | 2.05 ± 0.11 mas[1] |
| Distance | 1,590 ± 90 ly (490 ± 30 pc) |
| Absolute magnitude (MV) | −5.4[5] |
| Details | |
| Mass | 10.1[6] M☉ |
| Radius | 31[5] R☉ |
| Luminosity | 28,200[5] L☉ |
| Surface gravity (log g) | 2.55[7] cgs |
| Temperature | 14,600[7] K |
| Rotational velocity (v sin i) | 17[7] km/s |
| Age | 22.6[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nomenclature
φ Velorum (Latinised to Phi Velorum, abbreviated to φ Vel) is the Bayer designation for this star. It is also listed as HR 3940 in the Bright Star Catalogue and HD 86440 in the Henry Draper Catalogue. It has the traditional name Tseen Ke, from Chinese 天紀 (Mandarin tiānjì) "star chart". (lit. "Record of Heaven").
Properties
φ Velorum has a temperature of 14,600 K. Combined with a radius of 31 R☉, it has a luminosity of 28,200 L☉. It has exhausted its core hydrogen and left the main sequence to become a supergiant. It has a current mass of about 10 M☉.
Companion
φ Velorum has an optical companion 39" away. It is a 12th magnitude K0 giant star.[9][10]
References
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