Kepler-28

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Kepler-31

A diagram of the Kepler-31 System, compared to our Inner Solar System.
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 28m 32.887s
Declination +42° 25′ 45.91″
Apparent magnitude (V) 15.306[2]
Characteristics
Spectral type G5[3]
Astrometry
Distance 1989[3] ly
(610 pc)
Details
Mass 0.75[2] M
Radius 0.70[2] R
Luminosity [2] L
Temperature 4590[2] K
Metallicity [Fe/H] 0.34[2] dex
Rotational velocity (v sin i) 0.6[2] km/s
Other designations

Kepler-28 is a star in the northern constellation of Cygnus, the swan, that is orbited by a planet found to be unequivocally within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 19h 28m 32.887s}, Declination +42° 25′ 45.91″.[4] With an apparent visual magnitude of 15.036,[2] this star is too faint to be seen with the naked eye.

The Kepler-28 system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.51 MJ 0.062 5.9123
c 1.36 MJ 0.081 8.9858

References[edit]

  1. ^ "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15 
  2. ^ a b c d e f g h Kepler-28b, NASA Ames Research Center, retrieved 2011-12-06 
  3. ^ a b c Schneider, Jean, "Star: Kepler-31", Extrasolar Planets Encyclopaedia (Paris Observatory), retrieved 2011-12-06 
  4. ^ "Kepler Discoveries". 2011-12-05. 

Coordinates: Sky map 19h 28m 32.887s, +42° 25′ 45.91″