Iota Cephei
Star ι Cephei |
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Iota Cephei in the constellation Cepheus | |||||||||||||||
AladinLite | |||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Cepheus | ||||||||||||||
Right ascension | 22 h 49 m 40.82 s | ||||||||||||||
declination | + 66 ° 12 ′ 1.5 ″ | ||||||||||||||
Apparent brightness | (3.6704 ± 0.0005) mag | ||||||||||||||
Typing | |||||||||||||||
B − V color index | −0.354 | ||||||||||||||
U − B color index | +2.133 | ||||||||||||||
Spectral class | K0 III | ||||||||||||||
Astrometry | |||||||||||||||
Radial velocity | (−12.59 ± 0.2) km / s | ||||||||||||||
parallax | (28.29 ± 0.1) mas | ||||||||||||||
distance | 115 ly 35.3 pc |
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Visual absolute brightness M vis | 0.76 mag | ||||||||||||||
Proper movement | |||||||||||||||
Rec. Share: | (−65.89 ± 0.12) mas / a | ||||||||||||||
Dec. portion: | (−125.17 ± 0.09) mas / a | ||||||||||||||
Physical Properties | |||||||||||||||
Dimensions | 1.61 M ☉ | ||||||||||||||
radius | (10.05 ± 0.18) R ☉ | ||||||||||||||
Luminosity |
(49.6 ± 2.5) L ☉ |
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Effective temperature | (4831 ± 74) K. | ||||||||||||||
Other names and catalog entries |
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Iota Cephei (ι Cep, ι Cephei) is a star of the northern circumpolar constellation Cepheus . This star does not have a star name recognized by the IAU .
The 3.67 mag bright giant star has a radius ten times larger than the sun and shines at a distance of 115 light years .
Individual evidence
- ↑ a b c Iota Cephei in Hipparcos. Retrieved December 26, 2016 .
- ↑ a b c d e f iot Cep - Variable Star. In: SIMBAD Astronomical Object Database. Center de Données astronomiques de Strasbourg, accessed December 26, 2016 .
- ^ A b S. Hekker, S. Reffert, A. Quirrenbach, DS Mitchell, DA Fischer, GW Marcy, RP Butler: Precise radial velocities of giant stars, I Stable stars. , Astronomy & Astrophysics (2006), Volume 454, Number 3, Pages 943-949 , doi : 10.1051 / 0004-6361: 20064946
- ↑ a b c P. Berio et al .: Chromosphere of K giant stars - Geometrical extent and spatial structure detection. Astronomy & Astrophysics, A59 (2011), Volume 535 , doi : 10.1051 / 0004-6361 / 201117479