HD 212710
B-type main-sequence star
From Wikipedia, the free encyclopedia
HD 212710 is a star in Cepheus[1] with an apparent magnitude of 5.258[3] and a spectral type of B9.5 Vn,[4] indicating that it is a B-type main sequence star, giving it a blue hue. It is about 254 light-years away from the Solar System. It has about 2.61 times the mass of the Sun, 2.387 times the radius of the Sun and is 53.79 times as luminous.
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | 22h 13m 10.51283s[2] |
| Declination | +86° 06′ 28.8116″[2] |
| Apparent magnitude (V) | 5.258±0.009[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | B9.5 Vn[4] |
| U−B color index | −0.11[5] |
| B−V color index | −0.03[5] |
| Astrometry | |
| Radial velocity (Rv) | −17.80±0.49[2] km/s |
| Proper motion (μ) | RA: +60.554 mas/yr[2] Dec.: +39.468 mas/yr[2] |
| Parallax (π) | 12.8648±0.1662 mas[2] |
| Distance | 254 ± 3 ly (78 ± 1 pc) |
| Absolute magnitude (MV) | 0.79[6] |
| Details | |
| Mass | 2.61+0.438 −0.254[7] M☉ |
| Radius | 2.387+0.086 −0.052[7] R☉ |
| Luminosity | 53.79±1.38[2] L☉ |
| Surface gravity (log g) | 4.0991±0.0652[7] cgs |
| Temperature | 10162+164.7 −134[7] K |
| Other designations | |
| AG+85 372, BD+85 383, FK5 1648, HD 212710, HIP 109693, HR 8546, SAO 3721, 2MASS J22131056+8606287[8] | |
| Database references | |
| SIMBAD | data |
Nomenclature
This star doesn't have a Bayer or Flamsteed designation. The designation HD 212710 comes from the Henry Draper Catalogue. It is also known as BD+85 383, SAO 3721, HR 8546, or HIP 109693 from various star catalogues.[8]
Some sources identify this star with the Chinese star name Tiānhuángdàdì (Chinese: 天皇大帝, "Great Emperor of Heaven" or "Tianhuang Emperor"). It is an independent constellation in the system of Chinese constellations, belonging to the Purple Forbidden enclosure.[10]