Imaginary Picture of Kepler-357 d
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Exoplanet Name : Kepler-357 d
Alternate Name :
Radius (Rjup / Re): 0.3060 (Rjup) 3.4300 (Rearth)
Mass (Mjup / Me): 0.0261 (Mjup) 8.3010 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2460 (AU) 0.2460 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1355
Orbital Period(Observed/Estimated) 49.50 (Days Obs.) 50.46 (Days Est.)
Star Radiation at Atmospheric Boundary: 8979.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 434.5 (K)
Blackbody T 0.3(K) 408.0 (K)
Blackbody T 0.7(K) 330.1 (K)
Tidally Locked Blackbody T 0.1(K) 516.7 (K)
Tidally Locked Blackbody T 0.3(K) 485.2 (K)
Size Class: 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-357
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5036 (K)
Spectral type : K1
Metalicity : 0.1
Absolute Magnitude: 25.0
Apparent Magnitude: 14.0
Right Ascension(RA) 291.2431
Declination (DEC) 44.0087
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-357%20d/
Kepler-357 d
Kepler-357 d

  • Kepler-357 d is an exoplanet orbiting the star Kepler-357. Its discovery was publicly announced on 2014.
  • The host star Kepler-357 has apparent magnitude of 14.0, with absolute magnitude of 25.0.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5036 with its spectral types of K1
  • In this planetary system, the extrasolar planet Kepler-357 d orbits around the star Kepler-357 every 49.5 days with its orbital distance of 0.25 AU ( 36801076.2 km)
  • (Projected orbit of Kepler-357 d around its host star Kepler-357)


  • The Star Kepler-357 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.456 AU ( 68219361.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.630 AU ( 94296984.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.960 AU ( 143687737.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.413 AU ( 211442799.7 km)
  • Radiation at Planetary Boundary of Kepler-357 d : 8979.12 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-357)



  • Kopparapu Recent Venus for Star Kepler-357 distance : 0.492 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-357 distance : 0.623 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-357 distance : 0.602 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-357 distance : 0.661 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-357 distance : 1.128 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-357 distance : 1.190 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-357)



  • Original Kopparapu Recent Venus for Star Kepler-357 distance : 0.487 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-357 distance : 0.642 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-357 distance : 0.645 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-357 distance : 1.147 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-357 distance : 1.193 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-357)



    (Position in Stellar Map of star Kepler-357 and its Exoplanet Kepler-357 d)



    (Zoomed position in Stellar Map of star Kepler-357 and its Exoplanet Kepler-357 d (zoom level 3))