HD 17156

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Stern
HD 17156
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
Constellation Cassiopeia
Right ascension 02 h 49 m 44.49 s
declination + 71 ° 45 ′ 11.6 ″
Apparent brightness 8.17 likes
Typing
Known exoplanets 1
Spectral class G5
Astrometry
parallax (13.33 ± 0.72)  mas
distance (245 ± 13)  ly
(75.0 ± 4.1)  pc  
Visual absolute brightness M vis +3.79 mag
Proper movement 
Rec. Share: (91.14 ± 0.49)  mas / a
Dec. portion: (−33.14 ± 0.56)  mas / a
Physical Properties
Dimensions (1.2 ± 0.1)  M
radius (1.47 ± 0.13)  R
Effective temperature (6079 ± 56)  K.
Metallicity [Fe / H] (0.24 ± 0.03)
Age (5.7 ± 1.3) · 10 9  a
Other names
and catalog entries
Bonn survey BD + 71 ° 171
Henry Draper Catalog HD 17156 [1]
Hipparcos catalog HIP 13192 [2]
SAO catalog SAO 4737 [3]
Tycho catalog TYC 4321-1320-1 [4]Template: Infobox star / maintenance / specification of the TYC catalog
Other names GSC 04321-01320, PPM 5099
annotation
  1. ↑ Calculated from apparent brightness and distance.

HD 17156 is a sub-giant in the constellation Cassiopeia, about 245 light years away, with an apparent magnitude of about 8.2 mag.

In 2007 Debra Fischer discovered an extrasolar planet orbiting this star. This is called HD 17156 b .

Web links

Individual evidence

  1. a b c Hipparcos catalog (ESA 1997)
  2. a b c Hipparcos, the New Reduction (van Leeuwen, 2007)