Theta Cephei
Star θ Cephei |
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Theta Cephei in the constellation Cepheus | |||||||||||||||||
AladinLite | |||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Cepheus | ||||||||||||||||
Right ascension | 20 h 29 m 34.89 s | ||||||||||||||||
declination | + 62 ° 59 ′ 38.8 ″ | ||||||||||||||||
Apparent brightness | 4.2715 mag | ||||||||||||||||
Typing | |||||||||||||||||
Spectral class | A7 III C | ||||||||||||||||
Astrometry | |||||||||||||||||
Radial velocity | -6.8 ± 0.11 km / s | ||||||||||||||||
parallax | (23.90 ± 0.60) mas | ||||||||||||||||
distance | 136 ly 41.8 pc |
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Proper movement | |||||||||||||||||
Rec. Share: | (45.07 ± 0.52) mas / a | ||||||||||||||||
Dec. portion: | (−12.59 ± 0.60) mas / a | ||||||||||||||||
Physical Properties | |||||||||||||||||
Other names and catalog entries |
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Theta Cephei (θ Cep, θ Cephei) is a star of the northern circumpolar constellation Cepheus , it is also called Al Kidr .
The 4.2 mag bright Theta Cephei is located approx. 12 ° west of Alpha Cephei (Alderamin), behind Eta Cephei , and shines at a distance of approx. 136 light years .
Individual evidence
- ↑ a b c d Theta Cephei at Hipparcos. Retrieved December 24, 2016 .
- ↑ a b tet Cep - Spectroscopic binary. In: SIMBAD Astronomical Object Database. Center de Données astronomiques de Strasbourg, accessed December 25, 2016 .
- ^ RH Allen: Star Names: Their Lore and Meaning . Dover Publications Inc, New York, ISBN 0-486-21079-0 , pp. 157 . Look here