Imaginary Picture of Kepler-22 b
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Exoplanet Name : Kepler-22 b
Alternate Name :
Radius (Rjup / Re): 0.2100 (Rjup) 2.3539 (Rearth)
Mass (Mjup / Me): 0.1100 (Mjup) 34.9732 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.8490 (AU) 0.8490 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.7936
Orbital Period(Observed/Estimated) 289.86 (Days Obs.) 290.11 (Days Est.)
Star Radiation at Atmospheric Boundary: 1511.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 278.3 (K)
Blackbody T 0.3(K) 261.4 (K)
Blackbody T 0.7(K) 211.5 (K)
Tidally Locked Blackbody T 0.1(K) 331.0 (K)
Tidally Locked Blackbody T 0.3(K) 310.8 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-22
Alternate Name :
Star Distance(LY) : 619.7
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5518 (K)
Spectral type : G5
Metalicity : -0.3
Absolute Magnitude: 5.6
Apparent Magnitude: 12.0
Right Ascension(RA) 289.2175
Declination (DEC) 47.8844
Hubble Space Telescope Guide Star Catalog (GSC) ID 03546-02301
Discovered by
Discovery Paper - Authors "William J. Borucki1, David G. Koch1, Natalie Batalha2, Stephen T. Bryson1, Jason Rowe3, Francois Fressin4, Guillermo Torres4, Douglas A. Caldwell3, J_rgen Christensen-Dalsgaard5,6, William D. Cochran7Show full author list "
Discovery Paper - Title Kepler-22b: A 2.4 EARTH-RADIUS PLANET IN THE HABITABLE ZONE OF A SUN-LIKE STAR
Discovery Paper - Journal "The Astrophysical Journal,olume 745,umber 2"
Discovery Paper - URL http://iopscience.iop.org/article/10.1088/0004-637X/745/2/120/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-22+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-22%20b/
Kepler-22 b
Kepler-22 b

  • Kepler-22 b is an exoplanet orbiting the star Kepler-22, located about 619.7 light-years (190.0 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star Kepler-22 has apparent magnitude of 12.0, with absolute magnitude of 5.6.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5518 with its spectral types of G5
  • In this planetary system, the extrasolar planet Kepler-22 b orbits around the star Kepler-22 every 289.9 days with its orbital distance of 0.85 AU ( 127008592.2 km)
  • (Projected orbit of Kepler-22 b around its host star Kepler-22)


  • The Star Kepler-22 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.646 AU ( 96606021.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.893 AU ( 133534767.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.360 AU ( 203477434.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.002 AU ( 299425959.1 km)
  • Radiation at Planetary Boundary of Kepler-22 b : 1511.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-22)



  • Kopparapu Recent Venus for Star Kepler-22 distance : 0.680 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-22 distance : 0.861 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-22 distance : 0.831 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-22 distance : 0.912 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-22 distance : 1.531 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-22 distance : 1.615 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-22)



  • Original Kopparapu Recent Venus for Star Kepler-22 distance : 0.677 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-22 distance : 0.885 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-22 distance : 0.896 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-22 distance : 1.558 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-22 distance : 1.620 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-22)



    (Position in Stellar Map of star Kepler-22 and its Exoplanet Kepler-22 b)



    (Zoomed position in Stellar Map of star Kepler-22 and its Exoplanet Kepler-22 b (zoom level 3))