V354 Cephei
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 33m 34.64s[1] |
| Declination | +58° 53′ 47.1″[1] |
| Apparent magnitude (V) | 10.82 to 11.35[2] |
| Characteristics | |
| Spectral type | M2.5Iab:[1] |
| B−V color index | 2.8[1] |
| Variable type | LC[2] |
| Astrometry | |
| Distance | ~9,000[3][4] ly (~3,000[3][4] pc) |
| Absolute magnitude (MV) | -7.6 (variable)[5] |
| Details | |
| Radius | 690-1,520[5] R☉ |
| Luminosity | 400,000[5] L☉ |
| Surface gravity (log g) | −0.5[5] cgs |
| Temperature | 3,650[5] K |
| Other designations | |
V354 Cep. | |
| Database references | |
| SIMBAD | data |
V354 Cephei is a red supergiant star located within the Milky Way. It is an irregular variable located approximately 9,000 light-years away from our Sun, and is currently considered one of the largest known stars, with a radius estimate of 690-1,520 times that of the Sun, or 1,060,000,000 km at its greatest extent.[5] Assuming the upper size estimate is correct, if it were placed in the center of the Solar System, it would extend to 7 AU, between the orbits of Jupiter and Saturn.
See also
References
- 1 2 3 4 V* V354 Cep -- Pulsating variable Star, database entry, SIMBAD. Accessed on line November 12, 2010.
- 1 2 V354 Cep, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 12, 2010.
- 1 2 V354 Cephei is in the Cep OB1 association, which has an adopted estimated distance modulus of 12.2. See Tables 1 and 2, Levesque et al. 2005.
- 1 2 "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought", Emily M. Levesque, Philip Massey, K. A. G. Olsen, Bertrand Plez, Eric Josselin, Andre Maeder, and Georges Meynet, The Astrophysical Journal 628, #2 (August 2005), pp. 973-985, doi:10.1086/430901, Bibcode: 2005ApJ...628..973L.
- 1 2 3 4 5 6 Table 4, Levesque et al. 2005
External links
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