V354 Cephei
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
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|---|---|
| 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] |
| Details | |
| Radius | 1520[3] R☉ |
| Luminosity (bolometric) | 370,000[3] L☉ |
| Surface gravity (log g) | −0.5[3] |
| Temperature | 3650[3] K |
| Astrometry | |
| Distance | ~9,000[4][5] ly (~3,000[4][5] pc) |
| Other designations | |
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V354 Cep.
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| 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 1520 times that of the Sun, or 1,060,000,000 km.[3] Assuming the size estimate is correct, if it were placed in the center of our Solar System, it would extend to 7 AU, between the orbits of Jupiter and Saturn.
[edit] See also
[edit] References
- ^ a b c d V* V354 Cep -- Pulsating variable Star, database entry, SIMBAD. Accessed on line November 12, 2010.
- ^ a b 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.
- ^ a b c d e Table 4, Levesque et al. 2005, using Mbol = −9.17 for V354 Cephei (see the table) and 4.74 for the Sun (p. 982.)
- ^ a b 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.
- ^ a b "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.
[edit] External links
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