Imaginary Picture of Kepler-1228 b

Display orbital revolution of Kepler-1228 b around the hoststar Kepler-1228
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Exoplanet Name : Kepler-1228 b
Alternate Name : "2MASS J19461273+4657586 b, K02409.01, KIC 10024051 b, KOI-2409 b, KOI-2409.01, WISE J194612.68+465758.3 b"
Status : Confirmed
Radius (Rjup / Re): 0.1370 (Rjup) 1.5356 (Rearth)
Mass (Mjup / Me): 0.0124 (Mjup) 3.9315 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0125 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0016
Orbital Period(Observed/Estimated) 0.58 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.6672
Star Radiation at Atmospheric Boundary: 2186567.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1716.3 (K)
Blackbody T 0.3(K) 1611.7 (K)
Blackbody T 0.7(K) 1304.1 (K)
Tidally Locked Blackbody T 0.1(K) 2041.0 (K)
Tidally Locked Blackbody T 0.3(K) 1916.7 (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-1228
Alternate Name : "2MASS J19461273+4657586, KIC 10024051, KOI-2409, WISE J194612.68+465758.3"
Star Distance(LY) : 1680.6
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 5.1 (GY)
Temperature : 4767 (K)
Spectral type : K1
UV portion[%]: 3.6
Visible portion[%]: 37.9
IR portion[%]: 58.5
Metalicity : -0.2
Absolute Magnitude: 4.8
Apparent Magnitude: 13.4
Right Ascension(RA) 296.5531
Declination (DEC) 46.9663
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha15"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 449 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1228%20b/
Kepler-1228 b
Kepler-1228 b

  • Kepler-1228 b is an exoplanet orbiting the star Kepler-1228, located about 1680.6 light-years (515.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1228 has apparent magnitude of 13.4, with absolute magnitude of 4.8.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4767 with its spectral types of K1
  • In this planetary system, the extrasolar planet Kepler-1228 b orbits around the star Kepler-1228 every 0.6 days with its orbital distance of 0.01 AU ( 1868670.5 km)
  • (Projected orbit of Kepler-1228 b around its host star Kepler-1228)


  • The Star Kepler-1228 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.361 AU ( 54056071.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.499 AU ( 74719616.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.761 AU ( 113856160.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.120 AU ( 167544327.7 km)
  • Radiation at Planetary Boundary of Kepler-1228 b : 2186567.58 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1228)



  • Kopparapu Recent Venus for Star Kepler-1228 distance : 0.395 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1228 distance : 0.500 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1228 distance : 0.483 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1228 distance : 0.530 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1228 distance : 0.915 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1228 distance : 0.965 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1228)



  • Original Kopparapu Recent Venus for Star Kepler-1228 distance : 0.390 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1228 distance : 0.516 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1228 distance : 0.516 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1228 distance : 0.930 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1228 distance : 0.968 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1228)



    (Position in Stellar Map of star Kepler-1228 and its Exoplanet Kepler-1228 b)



    (Zoomed position in Stellar Map of star Kepler-1228 and its Exoplanet Kepler-1228 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1228*)
    *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