RW Cephei
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 23m 07.02s |
| Declination | +55° 57' 47.6" |
| Apparent magnitude (V) | +6.52 |
| Astrometry | |
| Parallax (π) | 0.81 ± 0.36 mas |
| Distance | 11,500 assumed as member of Cep OB1[1] ly |
| Absolute magnitude (MV) | -9.4[1] |
| Characteristics | |
| Spectral type | K2Ia0 |
| Variable type | SRd |
| Details | |
| Mass | 40 M☉ |
| Radius | 1,260-1,610 R☉ |
| Luminosity | 555,000[1] L☉ |
| Temperature | 4015[2] K |
| Age | ? years |
| Other designations | |
| Database references | |
| SIMBAD | data |
RW Cephei is a red hypergiant star in the constellation Cepheus. One of the largest stars known, RW Cephei is estimated at 1,260-1,610 solar radii. RW Cephei, while nearly as large as the orbit of Jupiter, is the largest star in the constellation of Cephus, dwarfing V354 Cephei and VV Cephei A. RW Cephei is also a semi-regular variable star of type LC. Its surface is subject to pulsations in temperature and luminosity. Over the past 50 to 70 years it has varied from classes G8 to M0 with no discernable pattern.
References
- ↑ 1.0 1.1 1.2 Humphreys, R. M. (1978). "Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way". The Astrophysical Journal Supplement Series 38: 309. doi:10.1086/190559.
- ↑ Davies, B.; Kudritzki, R. P.; Figer, D. F. (2010). "The potential of red supergiants as extragalactic abundance probes at low spectral resolution". Monthly Notices of the Royal Astronomical Society 407 (2): 1203. doi:10.1111/j.1365-2966.2010.16965.x.
See also
- List of largest stars
| <<< 7. VY Canis Majoris | 9. PZ Cassiopeiae >>> |
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