Kepler-23

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Kepler-23
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
Proper motion (μ) RA: -0.4[4] mas/yr
Dec.: 0.6[4] mas/yr
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
KOI-168, KIC 11512246, GSC 03564-01806, 2MASS J19365254+4928452
Database references
SIMBAD data
KIC data

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″.[5] 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. ^ a b Zacharias, N. (2009). "Third U.S. Naval Observatory CCD Astrograph Catalog (UCAC3)". VizieR On-line Data Catalog. Bibcode:2009yCat.1315....0Z. 
  5. ^ "Kepler Discoveries". 2011-12-05. 

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