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Artist impression of Kepler-102.jpg
An artist impression of Kepler-102 (star system close-up view).
Observation data
Epoch       Equinox
Right ascension 18h 45m 55.86s[1]
Declination +47° 12′ 28.91″[1]
Apparent magnitude (V) 11.492
Mass 0.8 [2] M
Radius 0.74 [2] R
Temperature 4903 [2] K
Metallicity [Fe/H] +0.08 [2] dex
Other designations
Database references

Kepler-102 is a star with five known planets. Kepler-102 is somewhat less luminous than the Sun.

Planetary system[edit]

On January 2014, a system of five planets around the star was announced, three of them being smaller than Earth. While 3 of the transit signals were discovered during the first year of the Kepler mission, their small size made them hard to confirm as possibilities of these being false positives were needed to be removed. Later, two other signals were detected. Follow-up radial velocity data helped to determine the mass of the largest planet.[3]

The Kepler-102 planetary system[4]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b 0.055 5.28696 85.37° 0.47 R
c 0.067 7.07142 87.09° 0.58 R
d 0.086 10.3117 87.09° 1.18 R
e 8.9±2.0 M 0.116 16.1457 87.66° 2.22 R
f 0.165 27.4536 88.24° 0.88 R

See also[edit]


  1. ^ a b
  2. ^ a b c d
  3. ^ Masses, radii, and orbits of small Kepler planets: the transition from gaseous to rocky planets accessdate=8 January 2014
  4. ^