HD 125288
From Wikipedia, the free encyclopedia
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 14h 20m 19.54267s[2] |
| Declination | −56° 23′ 11.3838″[2] |
| Apparent magnitude (V) | 4.30[1] |
| Characteristics | |
| Evolutionary stage | Supergiant[3] |
| Spectral type | B5Ib/II[4] or B6Ib[5] |
| B−V color index | 0.082±0.003[1] |
| Astrometry | |
| Radial velocity (Rv) | 4.2±2.7[1] km/s |
| Proper motion (μ) | RA: −9.437 mas/yr[2] Dec.: −7.543 mas/yr[2] |
| Parallax (π) | 2.2511±0.1972 mas[2] |
| Distance | 1,270±130 ly (390±40 pc)[6] |
| Absolute magnitude (MV) | −3.56[1] |
| Details[6] | |
| Mass | 9.3±0.3 M☉ |
| Radius | 21±2 R☉ |
| Luminosity | 12,600+3,200 −2,600 L☉ |
| Surface gravity (log g) | 2.77±0.05 cgs |
| Temperature | 13,700±300 K |
| Rotational velocity (v sin i) | 23±4 km/s |
| Age | 28.84+3.52 −3.14 Myr |
| Other designations | |
| v Cen, CPD−55°5984, FK5 529, GC 19318, HD 125288, HIP 70069, HR 5358, SAO 241641[7] | |
| Database references | |
| SIMBAD | data |
HD 125288 is a single[8] star in the southern constellation of Centaurus. It has the Bayer designation v Centauri (lower case V); while HD 125288 is the star's identifier in the Henry Draper catalogue. The object has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.30.[1] Based on spectroscopic measurements, it is located at a distance of approximately 1,270 light years from Earth.[6] This is a candidate runaway star that is moving to the west and falling back into the Galactic plane.[5] It has an absolute magnitude of −3.56.[1]
This massive B-type supergiant star[3] has a stellar classification of B5Ib/II[4] or B6Ib.[5] It is around 29 million years old and has 9 times the mass of the Sun. The star has expanded to 21 times the girth of the Sun and is spinning with a projected rotational velocity of 23 km/s. It is radiating 12,600 times the luminosity of the Sun from its photosphere at an effective temperature of 13,700 K.[6]
In 2016, an asterism including HD 125288 (SAO 241641) was unofficially identified in honor of David Bowie.[9][10]
