Imaginary Picture of Kepler-428 b
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Exoplanet Name : Kepler-428 b
Alternate Name : KOI-830 b
Radius (Rjup / Re): 1.0800 (Rjup) 12.1057 (Rearth)
Mass (Mjup / Me): 1.2700 (Mjup) 403.7813 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0433 (AU) 0.0433 (AU Est.)
Eccentricity : 0.2200
Orbital Period(Yrs) 0.0097
Orbital Period(Observed/Estimated) 3.53 (Days Obs.) 3.53 (Days Est.)
Star Radiation at Atmospheric Boundary: 263663.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1011.4 (K)
Blackbody T 0.3(K) 949.8 (K)
Blackbody T 0.7(K) 768.5 (K)
Tidally Locked Blackbody T 0.1(K) 1202.7 (K)
Tidally Locked Blackbody T 0.3(K) 1129.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KOI-830
Alternate Name :
Star Distance(LY) : 2239.0
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 5.0 (GY)
Temperature : 5150 (K)
Spectral type : K1
Metalicity : 0.1
Absolute Magnitude: 6.3
Apparent Magnitude: 15.5
Right Ascension(RA) 290.5817
Declination (DEC) 40.5775
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "G. Hebrard, A. Santerne, G. Montagnier, G. Bruno, M. Deleuil, M. Havel, J.-M. Almenara, C. Damiani, S.C.C. Barros, A.S. Bonomo, F. Bouchy, R.F. Diaz, C. Moutou"
Discovery Paper - Title "Characterization of the four new transiting planets KOI-188b, KOI-195b, KOI-192b, and KOI-830b"
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KOI-830+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/KOI-830%20b/
Kepler-428 b
Kepler-428 b

  • Kepler-428 b is an exoplanet orbiting the star KOI-830, located about 2239.0 light-years (686.5 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star KOI-830 has apparent magnitude of 15.5, with absolute magnitude of 6.3.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5150 with its spectral types of K1
  • In this planetary system, the extrasolar planet Kepler-428 b orbits around the star KOI-830 every 3.5 days with its orbital distance of 0.04 AU ( 6477587.8 km)
  • (Projected orbit of Kepler-428 b around its host star KOI-830)


  • The Star KOI-830 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.435 AU ( 65068148.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.601 AU ( 89941185.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.916 AU ( 137050463.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.348 AU ( 201675760.3 km)
  • Radiation at Planetary Boundary of Kepler-428 b : 263663.31 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-830)



  • Kopparapu Recent Venus for Star KOI-830 distance : 0.467 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-830 distance : 0.591 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-830 distance : 0.571 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-830 distance : 0.627 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-830 distance : 1.066 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-830 distance : 1.124 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-830)



  • Original Kopparapu Recent Venus for Star KOI-830 distance : 0.463 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-830 distance : 0.609 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-830 distance : 0.612 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-830 distance : 1.084 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-830 distance : 1.127 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-830)



    (Position in Stellar Map of star KOI-830 and its Exoplanet Kepler-428 b)



    (Zoomed position in Stellar Map of star KOI-830 and its Exoplanet Kepler-428 b (zoom level 3))