| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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 mas[3] |
| 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 | |
| IRC +60367, V355 Cep, 2MASS J22491046+5918129 | |
| 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
[edit]- ^ "All-Sky Automated Survey for Supernovae". ASAS-SN. Ohio Starte Uni. Retrieved 4 August 2025.
- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d "VSX : Detail for V0355 Cep". vsx.aavso.org. Retrieved 2025-07-25.
- ^ a b c 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, arXiv:astro-ph/0504337, Bibcode:2005ApJ...628..973L, doi:10.1086/430901
- ^ a b c d 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, arXiv:2307.08785, Bibcode:2024MNRAS.529.3630H, doi:10.1093/mnras/stae738
 | This variable star–related article is a stub. You can help Wikipedia by expanding it. |