HD 188015

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HD 188015
Observation data
Epoch 2000      Equinox 2000
Constellation Vulpecula
Right ascension 19h 52m 04.5435s
Declination +28° 06′ 01.356″
Apparent magnitude (V) 8.242
Distance 171.66 ly
(52.63 pc)
Spectral type G5IV
Other designations
BD+27°3539, HIP 97769, SAO 87842
Database references

HD 188015 is an 8th magnitude star about 172 light-years away in the constellation of Vulpecula. It is a yellow subgiant, a Sun-like star that has ceased or is about to stop hydrogen fusion in its core. However, it is only slightly brighter than the Sun, but probably much older.

The star is almost twice as metal-rich as the Sun. Planets are common around such stars, and this star also has one known planet orbiting it.[1]

HD 18801 is in a binary star system, the second star is HD 188015 B, with a mass 0.210 of the Sun. [2]

The HD 188015 planetary system
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
c (unconfirmed) >0.07 MJ 0.08 8.386 0.23
b >1.50 ± 0.13 MJ 1.203 ± 0.070 461.2 ± 1.7 0.137 ± 0.026

See also[edit]


  1. ^ Marcy, Geoffrey W.; et al. (2005). "Five New Extrasolar Planets". The Astrophysical Journal. 619 (1): 570–584. Bibcode:2005ApJ...619..570M. doi:10.1086/426384. 
  2. ^ Open Exoplanet Catalogue HD 18801

External links[edit]