BK Camelopardalis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 03h 19m 59.2727s |
| Declination | +65° 39′ 08.253″ |
| Apparent magnitude (V) | 4.728 |
| Characteristics | |
| Spectral type | B2.5Vne |
| U−B color index | -0.77 |
| B−V color index | -0.15 |
| R−I color index | -0.13 |
| Variable type | Gamma Cassiopeiae variable |
| Astrometry | |
| Radial velocity (Rv) | -3.4 km/s |
| Proper motion (μ) | RA: 11.27 mas/yr Dec.: -14.32 mas/yr |
| Parallax (π) | 4.07 ± 0.62 mas |
| Distance | approx. 800 ly (approx. 250 pc) |
| Absolute magnitude (MV) | -2.26 |
| Details | |
| Mass | 8.1 M☉ |
| Radius | 4.7 R☉ |
| Luminosity | 4，980 L☉ |
| Temperature | 21，300 K |
| Rotational velocity (v sin i) | 351 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
| Database references | |
| SIMBAD | data |
BK Camelopardalis is a variable star in the Camelopardalis.
Chinese name
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.[1] 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.),[2] representing 上丞 (Shǎngchéng), meaning First Prime Minister.[3] 上丞 (Shǎngchéng) is westernized in Shang Ching by R.H. Allen, the meaning is "Higher Minister", but it is not cleared designation.[4]
References
- ↑ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
- ↑ (Chinese) http://zh.wikipedia.org/wiki/%E9%B9%BF%E8%B1%B9%E5%BA%A7
- ↑ English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name, Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Camelopardalis
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