Kepler-23

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Kepler-23

A diagram of the Kepler-23 System, compared to our Inner Solar System.
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 36m 52.0s
Declination +49° 28′ 45″
Apparent magnitude (V) 14.0[2]
Characteristics
Spectral type G5[3]
Astrometry
Distance 620[3] ly
(190 pc)
Details
Mass 1.11[2] M
Radius 1.52 ± 0.24[2] R
Luminosity 0.79 ± 0.04[2] L
Temperature 5760 ± 124[2] K
Metallicity [Fe/H] –0.09 ± 0.14[2] dex
Rotational velocity (v sin i) [2] km/s
Other designations

Kepler-23 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 36m 52.0s, Declination +49° 28′ 45″.[4] With an apparent visual magnitude of 14.0,[2] this star is too faint to be seen with the naked eye.

The Kepler-23 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b < 0.8 MJ 0.099 7.1073 1.9 R
c < 2.7 MJ 0.08 10.7421 3.2 R

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-23b, NASA Ames Research Center, retrieved 2011-12-06 
  3. ^ a b c Schneider, Jean, Star: Kepler-23, Extrasolar Planets Encyclopaedia (Paris Observatory), retrieved 2011-12-06 
  4. ^ "Kepler Discoveries". 2011-12-05. 

Coordinates: Sky map 19h 36m 52.0s, +49° 28′ 45″