Imaginary Picture of Kepler-657 b

Display orbital revolution of Kepler-657 b around the hoststar Kepler-657
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Exoplanet Name : Kepler-657 b
Alternate Name : "2MASS J19244735+4718280 b, K00734.01, KIC 10272442 b, KOI-734 b, KOI-734.01, WISE J192447.34+471827.4 b"
Radius (Rjup / Re): 0.3140 (Rjup) 3.5196 (Rearth)
Mass (Mjup / Me): 0.0267 (Mjup) 8.5027 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1658 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0672
Orbital Period(Observed/Estimated) 24.54 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.6864
Star Radiation at Atmospheric Boundary: 46437.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 655.2 (K)
Blackbody T 0.3(K) 615.3 (K)
Blackbody T 0.7(K) 497.8 (K)
Tidally Locked Blackbody T 0.1(K) 779.1 (K)
Tidally Locked Blackbody T 0.3(K) 731.7 (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-657
Alternate Name : "2MASS J19244735+4718280, KIC 10272442, KOI-734, WISE J192447.34+471827.4"
Star Distance(LY) : 3099.4
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.2 (GY)
Temperature : 5955 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 4.2
Apparent Magnitude: 14.1
Right Ascension(RA) 291.1973
Declination (DEC) 47.3078
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton, Stephen T. Bryson, Jeffrey L. Coughlin, Jason F. Rowe, Ganesh Ravichandran, Erik A. Petigura, Michael R. Haas, and Natalie M. Batalha"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 564 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-657%20b/
Kepler-657 b
Kepler-657 b

  • Kepler-657 b is an exoplanet orbiting the star Kepler-657, located about 3099.4 light-years (950.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-657 has apparent magnitude of 14.1, with absolute magnitude of 4.2.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5955 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-657 b orbits around the star Kepler-657 every 24.5 days with its orbital distance of 0.17 AU ( 24808286.4 km)
  • (Projected orbit of Kepler-657 b around its host star Kepler-657)


  • The Star Kepler-657 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.699 AU ( 104583467.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.966 AU ( 144561682.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.472 AU ( 220280013.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.167 AU ( 324151689.3 km)
  • Radiation at Planetary Boundary of Kepler-657 b : 46437.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-657)



  • Kopparapu Recent Venus for Star Kepler-657 distance : 0.717 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-657 distance : 0.908 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-657 distance : 0.877 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-657 distance : 0.961 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-657 distance : 1.596 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-657 distance : 1.683 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-657)



  • Original Kopparapu Recent Venus for Star Kepler-657 distance : 0.720 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-657 distance : 0.932 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-657 distance : 0.953 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-657 distance : 1.624 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-657 distance : 1.689 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-657)



    (Position in Stellar Map of star Kepler-657 and its Exoplanet Kepler-657 b)



    (Zoomed position in Stellar Map of star Kepler-657 and its Exoplanet Kepler-657 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-657*)
    *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