BK Camelopardalis
 Location of BK Camelopardalis (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 03h 19m 59.27267s |
| Declination | +65° 39′ 08.2502″ |
| Apparent magnitude (V) | 4.78 - 4.89 |
| Characteristics | |
| Spectral type | B2.5 Vne |
| U−B color index | −0.77 |
| B−V color index | −0.15 |
| R−I color index | −0.13 |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | -3.40 km/s |
| Proper motion (μ) |
RA: 11.25 mas/yr Dec.: −14.56 mas/yr |
| Parallax (π) | 4.28 ± 0.48mas |
| Distance | approx. 760 ly (approx. 230 pc) |
| Absolute magnitude (MV) | −2.05 |
| Details | |
| Mass | 7.5 M☉ |
| Radius | 4.0 R☉ |
| Surface gravity (log g) | 4.20 cgs |
| Temperature | 20,893 K |
| Rotational velocity (v sin i) | 328 km/s |
| Age | 31.6 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
BK Camelopardalis is a variable star in the constellation Camelopardalis.
In Chinese, 紫微右垣 (Zǐ Wēi Yòu Yuán), meaning Right Wall of Purple Forbidden Enclosure, refers to an asterism consisting of BK Camelopardalis, α Draconis, κ Draconis, λ Draconis, 24 Ursae Majoris, 43 Camelopardalis and α Camelopardalis. Consequently, BK Camelopardalis itself is known as 紫微右垣七 (Zǐ Wēi Yòu Yuán qī, English: the Seventh Star of Right Wall of Purple Forbidden Enclosure.) representing 上丞 (Shǎngchéng), meaning First Prime Minister. 上丞 (Shǎngchéng) is westernized in Shang Ching by R.H. Allen, the meaning is "Higher Minister", but it is not cleared designation.
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