Iota Cephei

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Star
ι Cephei
Iota Cephei in the constellation Cepheus
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
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  
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

Effective temperature (4831 ± 74)  K.
Other names
and catalog entries
Bayer name ι Cephei
Flamsteed name 32 Cephei
Bonn survey BD + 65 ° 1814
Bright Star Catalog HR 8694 [1]
Henry Draper Catalog HD 216228 [2]
Hipparcos catalog HIP 112724 [3]
SAO catalog SAO 20268 [4]
annotation
  1. ↑ Calculated from parallax.

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

  1. a b c Iota Cephei in Hipparcos. Retrieved December 26, 2016 .
  2. 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 .
  3. ^ 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
  4. 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