HD 125823
This article is about "a Centauri". For "A Centauri", see A Centauri. For "α Centauri", see Alpha Centauri.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 23m 02.24s[1] |
| Declination | −39° 30′ 42.5″[1] |
| Apparent magnitude (V) | +4.41 |
| Characteristics | |
| Spectral type | B7IIIp |
| U−B color index | −0.75 |
| B−V color index | −0.18 |
| Variable type | SX Ari |
| Astrometry | |
| Radial velocity (Rv) | +8 km/s |
| Proper motion (μ) | RA: -24.15 ± 0.13[1] mas/yr Dec.: -21.90 ± 0.13[1] mas/yr |
| Parallax (π) | 7.13 ± 0.16[1] mas |
| Distance | 460 ± 10 ly (140 ± 3 pc) |
| Absolute magnitude (MV) | −1.27[2] |
| Details | |
| Mass | 5.69 ± 0.30[2] M☉ |
| Radius | 3.7 ± 0.5[2] R☉ |
| Luminosity | 1,175[2] L☉ |
| Surface gravity (log g) | 4.20 ± 0.12[2] cgs |
| Temperature | 17,700[2] K |
| Rotation | 8.817744 days[2] |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 125823, also known as V761 Centauri and a Centauri, is a star in the constellation Centaurus. It is a blue-white B-type giant with a mean apparent magnitude of +4.41. It is approximately 460 light years from Earth. It is classified as an SX Arietis type variable star and its brightness varies from magnitude +4.38 to +4.43 with a period of 8.82 days.
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 4 5 6 7 North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics 334: 181–187, arXiv:astro-ph/9802286, Bibcode:1998A&A...334..181N
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