V Cephei
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 23h 56m 27.804s[1] |
| Declination | +83° 11′ 28.02″[1] |
| Apparent magnitude (V) | 6.57[2] |
| Characteristics | |
| Spectral type | A1V[3] |
| B−V color index | +0.07[2] |
| Astrometry | |
| Radial velocity (Rv) | −18.74[1] km/s |
| Proper motion (μ) | RA: +50.676[1] mas/yr Dec.: +6.869[1] mas/yr |
| Parallax (π) | 11.1865±0.0264 mas[1] |
| Distance | 291.6 ± 0.7 ly (89.4 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.78[4] |
| Details | |
| Mass | 2.27[5] M☉ |
| Radius | 1.7[5] R☉ |
| Luminosity | 17.4[5] L☉ |
| Surface gravity (log g) | 4.33[5] cgs |
| Temperature | 9,004[5] K |
| Metallicity [Fe/H] | −0.25[6] dex |
| Rotational velocity (v sin i) | 147[7] km/s |
| Age | 373[7] Myr |
| Other designations | |
| V Cep, BD+82°743, FK5 1650, HD 224309, HIP 118027, HR 9056, SAO 3994[8] | |
| Database references | |
| SIMBAD | data |
V Cephei is a white main sequence star in the constellation Cepheus. It only varies slightly by 0.03 of a magnitude. It was suspected of being variable by American astronomer Seth Carlo Chandler noting in 1890 that it varied by 0.7 magnitude but that it needed more confirmation. Subsequent observers were divided in whether they noted variability or not.[9] A subsequent study with photoelectric photometry showed no variability.[10]
With a spectral class of A1V, V Cephei is a main sequence star with a surface temperature of 9,004 K. It has twice the mass of the Sun and, with nearly twice its radius, it shines at 17 L☉.
References
[edit | edit source]- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
