BI Cygni
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 21m 21.91s |
| Declination | 36° 55′ 55.6″ |
| Characteristics | |
| Spectral type | M4 Iab[1] |
| Variable type | Lc[1] |
| Astrometry | |
| Details | |
| Radius | 916[2]-1,240[3] R☉ |
| Database references | |
| SIMBAD | data |
BI Cygni (IRC +40408 or BD+36 4025) is a red supergiant in the constellation Cygnus.
See also
References
- ^ a b 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.
- ^ Nicolas Mauron; Eric Josselin (2010). "The mass-loss rates of red supergiants and the de Jager prescription". arXiv:1010.5369 [astro-ph.SR].
- ^ Table 4 in Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (August 2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal. 628 (2): 973–985. arXiv:astro-ph/0504337. Bibcode:2005ApJ...628..973L. doi:10.1086/430901.
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