Kappa Cephei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 20h 08m 53.34492s[1] |
| Declination | +77° 42′ 41.0909″[1] |
| Apparent magnitude (V) | 4.39[2] |
| Characteristics | |
| Spectral type | B9III + A7V[3] |
| U−B color index | -0.11[2] |
| B−V color index | -0.05[2] |
| Astrometry | |
| Absolute magnitude (MV) | −0.54[4] |
| Kap Cep A | |
Distance | 323 ± 8 ly (99 ± 2 pc) |
| Kap Cep B | |
Distance | 326.2 ± 0.9 ly (100.0 ± 0.3 pc) |
| Details | |
| Kap Cep A | |
Myr | |
| Kap Cep B | |
| Radius | 1.32[6] R☉ |
| Luminosity | 4.05[6] L☉ |
| Temperature | 7119[6] K |
| Database references | |
| SIMBAD | data |
| B | |
| C | |
Kappa Cephei,
light years distant from the Sun, based on parallax
.
The two gravitationally-bound members of this system had an
″ along a position angle of 120°, as of 2015.[11] The primary, designated component A, has a stellar classification of B9III,[3] matching a blue giant. The magnitude 8.34 secondary, component B, is an A-type main-sequence star of class A7V.[3] A third star of 10th magnitude, BD+77 763, is listed as component C in the Washington Double Star Catalog
although it is a background object unrelated to the other two.
[11]
References
- ^ .
- ^ Bibcode:1995yCat.5050....0H.
- ^ doi:10.1086/110908.
- ^ S2CID 119257644.
- ^ Bibcode:1967IAUS...30...57E.
- ^ .
- ^ S2CID 33401607.
- ^ S2CID 119512018.
- ^ "kap Cep". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-11.
- S2CID 14878976.
- ^ doi:10.1086/323920.
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