Astronomy:V Coronae Borealis
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Short description: Mira-type long period variable star in the constellation Corona Borealis
 V Coronae Borealis in optical light | |
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 15h 49m 31.31093s [1] |
| Declination | +39° 34′ 17.9111″ [1] |
| Spectral type | C6,2e(N2e)[2] |
| Other designations | |
BD+40° 2929, HD 141826, HIP 77501, SAO 64929 | |
The visual band light curve of V Coronae Borealis, from AAVSO data[3]
V Coronae Borealis (V CrB) is a Mira-type long period variable star and carbon star in the constellation Corona Borealis. Its apparent magnitude varies between 6.9 and 12.6 over a period of 357 days[2]
V Coronae Borealis is too far from Earth for its parallax to be measured effectively. Basing on a period of 357 days, the absolute magnitude of V Coronae Borealis has been calculated to be -4.62.[4] It was estimated to around 8810 light-years distant in a 2012 paper, shining with a luminosity approximately 102831 times that of the Sun and has a surface temperature of 2877 K.[5]
References
- ↑ 1.0 1.1 "V Coronae Borealis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=V+CrB&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- ↑ 2.0 2.1 VSX (4 January 2010). "V Coronae Borealis". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10604.
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ Guandalini, R.; Cristallo, S. (2013). "Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way". Astronomy & Astrophysics 555: 7. doi:10.1051/0004-6361/201321225. A120. Bibcode: 2013A&A...555A.120G.
- ↑ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–57. doi:10.1111/j.1365-2966.2012.21873.x. Bibcode: 2012MNRAS.427..343M.
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