Astronomy:V355 Cephei
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Short description: Star in the constellation Cepheus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cepheus[2] |
| Right ascension | 22h 49m 10.47s[3] |
| Declination | +59° 18′ 13.0″[3] |
| Apparent magnitude (V) | 10.55 - 11.4[4] |
| Characteristics | |
| Spectral type | M2Iab[4] |
| Variable type | LC[4] |
| Astrometry | |
| Radial velocity (Rv) | −64.29±0.61[3] km/s |
| Proper motion (μ) | RA: −3.158[3] mas/yr Dec.: −2.017[3] mas/yr |
| Parallax (π) | 0.2244 ± 0.0289[3] mas |
| Distance | approx. 15,000 ly (approx. 4,500 pc) |
| Absolute magnitude (MV) | −6.1[5] |
| Details | |
| Radius | 790[6] R☉ |
| Luminosity | 106,000[6] L☉ |
| Surface gravity (log g) | −0.1[5] cgs |
| Temperature | 3,660[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
V355 Cephei is a red supergiant located in the constellation of Cepheus. It has a radius between 770±154[5] and 790[6] solar radii, making it one of the largest known stars. It is a slow irregular variable with an apparent magnitude that ranges between 10.55 - 11.4.[4]
References
- ↑ "All-Sky Automated Survey for Supernovae". Ohio Starte Uni.. https://asas-sn.osu.edu/.
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 4.0 4.1 4.2 4.3 "VSX : Detail for V0355 Cep". https://vsx.aavso.org/index.php?view=detail.top&oid=8707.
- ↑ 5.0 5.1 5.2 Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005-04-15), "The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought", The Astrophysical Journal 628 (2): 973, doi:10.1086/430901, Bibcode: 2005ApJ...628..973L
- ↑ 6.0 6.1 6.2 6.3 Healy, Sarah; Horiuchi, Shunsaku; Molla, Marta Colomer; Milisavljevic, Dan; Tseng, Jeff; Bergin, Faith; Weil, Kathryn; Tanaka, Masaomi (2024-05-07), "Red supergiant candidates for multimessenger monitoring of the next Galactic supernova", Monthly Notices of the Royal Astronomical Society 529 (4): 3630–3650, doi:10.1093/mnras/stae738, Bibcode: 2024MNRAS.529.3630H
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