Imaginary Picture of Kepler-157 c

Display orbital revolution of Kepler-157 c around the hoststar Kepler-157
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Exoplanet Name : Kepler-157 c
Alternate Name : "2MASS J19242333+3852321 c, K00442.01, KIC 3745690 c, KOI-442 c, KOI-442.01, WISE J192423.32+385232.2 c"
Status : Confirmed
Radius (Rjup / Re): 0.2000 (Rjup) 2.2418 (Rearth)
Mass (Mjup / Me): 0.0176 (Mjup) 5.5894 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1100 (AU) 0.1100 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0371
Orbital Period(Observed/Estimated) 13.54 (Days Obs.) 14.05 (Days Est.)
Surface Gravity (G Earth) 1.1122
Star Radiation at Atmospheric Boundary: 134181.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 854.2 (K)
Blackbody T 0.3(K) 802.2 (K)
Blackbody T 0.7(K) 649.1 (K)
Tidally Locked Blackbody T 0.1(K) 1015.8 (K)
Tidally Locked Blackbody T 0.3(K) 954.0 (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-157
Alternate Name : "2MASS J19242333+3852321, KIC 3745690, KOI-442, WISE J192423.32+385232.2"
Star Distance(LY) : 2522.4
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5791 (K)
Spectral type : G3
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.4
Metalicity : -0.1
Absolute Magnitude: 3.5
Apparent Magnitude: 12.9
Right Ascension(RA) 291.0972
Declination (DEC) 38.8756
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-157+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-157%20c/
Kepler-157 c
Kepler-157 c

  • Kepler-157 c is an exoplanet orbiting the star Kepler-157, located about 2522.4 light-years (773.4 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-157 has apparent magnitude of 12.9, with absolute magnitude of 3.5.
  • It is 0.9 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5791 with its spectral types of G3
  • In this planetary system, the extrasolar planet Kepler-157 c orbits around the star Kepler-157 every 13.5 days with its orbital distance of 0.11 AU ( 16455765.8 km)
  • (Projected orbit of Kepler-157 c around its host star Kepler-157)


  • The Star Kepler-157 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.788 AU ( 117922039.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.090 AU ( 162999074.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.660 AU ( 248374518.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.443 AU ( 365493984.4 km)
  • Radiation at Planetary Boundary of Kepler-157 c : 134181.66 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-157)



  • Kopparapu Recent Venus for Star Kepler-157 distance : 0.816 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-157 distance : 1.034 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-157 distance : 0.998 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-157 distance : 1.095 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-157 distance : 1.825 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-157 distance : 1.925 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-157)



  • Original Kopparapu Recent Venus for Star Kepler-157 distance : 0.818 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-157 distance : 1.062 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-157 distance : 1.082 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-157 distance : 1.857 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-157 distance : 1.931 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-157)



    (Position in Stellar Map of star Kepler-157 and its Exoplanet Kepler-157 c)



    (Zoomed position in Stellar Map of star Kepler-157 and its Exoplanet Kepler-157 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-157*)
    *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