Imaginary Picture of Kepler-228 c
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Exoplanet Name : Kepler-228 c
Alternate Name :
Radius (Rjup / Re): 0.2410 (Rjup) 2.7014 (Rearth)
Mass (Mjup / Me): 0.0209 (Mjup) 6.6479 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0520 (AU) 0.0520 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0113
Orbital Period(Observed/Estimated) 4.13 (Days Obs.) 3.95 (Days Est.)
Star Radiation at Atmospheric Boundary: 616951.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1250.9 (K)
Blackbody T 0.3(K) 1174.7 (K)
Blackbody T 0.7(K) 950.4 (K)
Tidally Locked Blackbody T 0.1(K) 1487.5 (K)
Tidally Locked Blackbody T 0.3(K) 1396.9 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-228
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6043 (K)
Spectral type : G0
Metalicity : -0.1
Absolute Magnitude: 25.0
Apparent Magnitude: 14.5
Right Ascension(RA) 296.2861
Declination (DEC) 48.2247
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK 0
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-228%20c/
Kepler-228 c
Kepler-228 c

  • Kepler-228 c is an exoplanet orbiting the star Kepler-228. Its discovery was publicly announced on 2014.
  • The host star Kepler-228 has apparent magnitude of 14.5, with absolute magnitude of 25.0.
  • It is 1.2 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 6043 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-228 c orbits around the star Kepler-228 every 4.1 days with its orbital distance of 0.05 AU ( 7779089.3 km)
  • (Projected orbit of Kepler-228 c around its host star Kepler-228)


  • The Star Kepler-228 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.799 AU ( 119532134.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.104 AU ( 165224647.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.683 AU ( 251765798.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.477 AU ( 370484401.5 km)
  • Radiation at Planetary Boundary of Kepler-228 c : 616951.82 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-228)



  • Kopparapu Recent Venus for Star Kepler-228 distance : 0.815 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-228 distance : 1.032 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-228 distance : 0.997 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-228 distance : 1.092 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-228 distance : 1.811 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-228 distance : 1.910 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-228)



  • Original Kopparapu Recent Venus for Star Kepler-228 distance : 0.820 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-228 distance : 1.060 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-228 distance : 1.086 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-228 distance : 1.843 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-228 distance : 1.917 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-228)



    (Position in Stellar Map of star Kepler-228 and its Exoplanet Kepler-228 c)



    (Zoomed position in Stellar Map of star Kepler-228 and its Exoplanet Kepler-228 c (zoom level 3))