BK Camelopardalis
 
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 03h 19m 59.27267s[1] |
| Declination | +65° 39′ 08.2502″[1] |
| Apparent magnitude (V) | 4.78 - 4.89[2] |
| Characteristics | |
| Spectral type | B2.5 Vne[3] |
| U−B color index | −0.77[4] |
| B−V color index | −0.15[4] |
| R−I color index | −0.13[4] |
| Variable type | γ Cas[2] |
| Astrometry | |
| Radial velocity (Rv) | -3.40[5] km/s |
| Proper motion (μ) | RA: 11.25[1] mas/yr Dec.: −14.56[1] mas/yr |
| Parallax (π) | 4.28 ± 0.48[1] mas |
| Distance | approx. 760 ly (approx. 230 pc) |
| Absolute magnitude (MV) | −2.05[6] |
| Details | |
| Mass | 7.5[3] M☉ |
| Radius | 4.0[7] R☉ |
| Surface gravity (log g) | 4.20[8] cgs |
| Temperature | 20,893[9] K |
| Rotational velocity (v sin i) | 328[8] km/s |
| Age | 31.6[3] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
BK Camelopardalis is a variable star in the constellation 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.[10] 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.[11] 上丞 (Shǎngchéng) is westernized in Shang Ching by R.H. Allen, the meaning is "Higher Minister", but it is not cleared designation.[12]
References
- 1 2 3 4 5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- 1 2 3 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.
- 1 2 3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- ↑ Zorec, J.; Briot, D. (1991). "Absolute magnitudes of B emission line stars - Correlation between the luminosity excess and the effective temperature". Astronomy and Astrophysics (ISSN 0004-6361). 245: 150. Bibcode:1991A&A...245..150Z.
- ↑ Underhill, A. B.; Divan, L.; Prevot-Burnichon, M.-L.; Doazan, V. (1979). "Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars". Monthly Notices of the Royal Astronomical Society. 189 (3): 601. Bibcode:1979MNRAS.189..601U. doi:10.1093/mnras/189.3.601.
- 1 2 Zorec, J.; Frémat, Y.; Cidale, L. (2005). "On the evolutionary status of Be stars. I. Field Be stars near the Sun". Astronomy and Astrophysics. 441: 235. arXiv:astro-ph/0509119
. Bibcode:2005A&A...441..235Z. doi:10.1051/0004-6361:20053051. - ↑ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497.
- ↑ (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.
- ↑ English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name Archived August 10, 2010, at the Wayback Machine., Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Camelopardalis
External links
This article is issued from Wikipedia - version of the 11/14/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.