Imaginary Picture of Kepler-228 b

Display orbital revolution of Kepler-228 b around the hoststar Kepler-228
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Exoplanet Name : Kepler-228 b
Alternate Name : "2MASS J19450867+4813288 b, K00756.03, KIC 10872983 b, KOI-756 b, KOI-756.03, WISE J194508.65+481328.6 b"
Radius (Rjup / Re): 0.1360 (Rjup) 1.5244 (Rearth)
Mass (Mjup / Me): 0.0142 (Mjup) 4.5162 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0380 (AU) 0.0380 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0070
Orbital Period(Observed/Estimated) 2.57 (Days Obs.) 7.81 (Days Est.)
Surface Gravity (G Earth) 1.9434
Star Radiation at Atmospheric Boundary: 1142652.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1459.2 (K)
Blackbody T 0.3(K) 1370.4 (K)
Blackbody T 0.7(K) 1108.8 (K)
Tidally Locked Blackbody T 0.1(K) 1735.3 (K)
Tidally Locked Blackbody T 0.3(K) 1629.6 (K)
Size Class: super-Earth-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 : "2MASS J19450867+4813288, KIC 10872983, KOI-756, WISE J194508.65+481328.6"
Star Distance(LY) : 5378.9
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5660 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.1
Absolute Magnitude: 3.4
Apparent Magnitude: 14.5
Right Ascension(RA) 296.2861
Declination (DEC) 48.2247
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-228+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-228%20b/
Kepler-228 b
Kepler-228 b

  • Kepler-228 b is an exoplanet orbiting the star Kepler-228, located about 5378.9 light-years (1649.2 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-228 has apparent magnitude of 14.5, with absolute magnitude of 3.4.
  • It is 0.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5660 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-228 b orbits around the star Kepler-228 every 2.6 days with its orbital distance of 0.04 AU ( 5684719.1 km)
  • (Projected orbit of Kepler-228 b 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 ) : 0.795 AU ( 118876623.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.098 AU ( 164318560.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.674 AU ( 250385121.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.463 AU ( 368452675.4 km)
  • Radiation at Planetary Boundary of Kepler-228 b : 1142652.87 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 : 0.829 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-228 distance : 1.050 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-228 distance : 1.014 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-228 distance : 1.112 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-228 distance : 1.861 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-228 distance : 1.963 AU

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



  • Original Kopparapu Recent Venus for Star Kepler-228 distance : 0.829 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-228 distance : 1.080 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-228 distance : 1.096 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-228 distance : 1.893 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-228 distance : 1.969 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 b)



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

    (Synthetic Spectrum of star Kepler-228*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102