Imaginary Picture of Kepler-631 b

Display orbital revolution of Kepler-631 b around the hoststar Kepler-631
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Exoplanet Name : Kepler-631 b
Alternate Name : "2MASS J19473258+4013416 b, K00639.01, KIC 5120087 b, KOI-639 b, KOI-639.01, WISE J194732.57+401341.5 b"
Status : Confirmed
Radius (Rjup / Re): 0.2590 (Rjup) 2.9031 (Rearth)
Mass (Mjup / Me): 0.0224 (Mjup) 7.1085 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1443 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0492
Orbital Period(Observed/Estimated) 17.98 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.8434
Star Radiation at Atmospheric Boundary: 129377.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 846.5 (K)
Blackbody T 0.3(K) 794.9 (K)
Blackbody T 0.7(K) 643.2 (K)
Tidally Locked Blackbody T 0.1(K) 1006.6 (K)
Tidally Locked Blackbody T 0.3(K) 945.3 (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-631
Alternate Name : "2MASS J19473258+4013416, KIC 5120087, KOI-639, WISE J194732.57+401341.5"
Star Distance(LY) : 2484.1
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.5 (GY)
Temperature : 6158 (K)
Spectral type : F8
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.2
Absolute Magnitude: 3.1
Apparent Magnitude: 12.5
Right Ascension(RA) 296.8858
Declination (DEC) 40.2282
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 545 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-631+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-631%20b/
Kepler-631 b
Kepler-631 b

  • Kepler-631 b is an exoplanet orbiting the star Kepler-631, located about 2484.1 light-years (761.6 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-631 has apparent magnitude of 12.5, with absolute magnitude of 3.1.
  • It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6158 with its spectral types of F8
  • In this planetary system, the extrasolar planet Kepler-631 b orbits around the star Kepler-631 every 18.0 days with its orbital distance of 0.14 AU ( 21587163.3 km)
  • (Projected orbit of Kepler-631 b around its host star Kepler-631)


  • The Star Kepler-631 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.015 AU ( 151899362.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.404 AU ( 209964615.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.139 AU ( 319939609.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.147 AU ( 470805150.4 km)
  • Radiation at Planetary Boundary of Kepler-631 b : 129377.92 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-631)



  • Kopparapu Recent Venus for Star Kepler-631 distance : 1.028 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-631 distance : 1.302 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-631 distance : 1.258 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-631 distance : 1.378 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-631 distance : 2.279 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-631 distance : 2.404 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-631)



  • Original Kopparapu Recent Venus for Star Kepler-631 distance : 1.038 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-631 distance : 1.337 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-631 distance : 1.373 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-631 distance : 2.320 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-631 distance : 2.413 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-631)



    (Position in Stellar Map of star Kepler-631 and its Exoplanet Kepler-631 b)



    (Zoomed position in Stellar Map of star Kepler-631 and its Exoplanet Kepler-631 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-631*)
    *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