Imaginary Picture of Kepler-831 b

Display orbital revolution of Kepler-831 b around the hoststar Kepler-831
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Exoplanet Name : Kepler-831 b
Alternate Name : "2MASS J19395651+4243396 b, K01379.01, KIC 7211221 b, KOI-1379 b, KOI-1379.01, WISE J193956.52+424339.8 b"
Status : Confirmed
Radius (Rjup / Re): 0.1130 (Rjup) 1.2666 (Rearth)
Mass (Mjup / Me): 0.0072 (Mjup) 2.2946 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0617 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0154
Orbital Period(Observed/Estimated) 5.62 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.4303
Star Radiation at Atmospheric Boundary: 347748.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1083.8 (K)
Blackbody T 0.3(K) 1017.8 (K)
Blackbody T 0.7(K) 823.5 (K)
Tidally Locked Blackbody T 0.1(K) 1288.9 (K)
Tidally Locked Blackbody T 0.3(K) 1210.4 (K)
Size Class: super-Earth-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-831
Alternate Name : "2MASS J19395651+4243396, KIC 7211221, KOI-1379, WISE J193956.52+424339.8"
Star Distance(LY) : 1935.0
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.2 (GY)
Temperature : 5688 (K)
Spectral type : G3
UV portion[%]: 7.6
Visible portion[%]: 44.3
IR portion[%]: 48.1
Metalicity : 0.0
Absolute Magnitude: 3.7
Apparent Magnitude: 12.5
Right Ascension(RA) 294.9855
Declination (DEC) 42.7277
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 697 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-831&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-831%20b/
Kepler-831 b
Kepler-831 b

  • Kepler-831 b is an exoplanet orbiting the star Kepler-831, located about 1935.0 light-years (593.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-831 has apparent magnitude of 12.5, with absolute magnitude of 3.7.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5688 with its spectral types of G3
  • In this planetary system, the extrasolar planet Kepler-831 b orbits around the star Kepler-831 every 5.6 days with its orbital distance of 0.06 AU ( 9225300.0 km)
  • (Projected orbit of Kepler-831 b around its host star Kepler-831)


  • The Star Kepler-831 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.711 AU ( 106424919.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.983 AU ( 147107050.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.498 AU ( 224158590.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.205 AU ( 329859186.1 km)
  • Radiation at Planetary Boundary of Kepler-831 b : 347748.34 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-831)



  • Kopparapu Recent Venus for Star Kepler-831 distance : 0.741 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-831 distance : 0.939 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-831 distance : 0.907 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-831 distance : 0.994 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-831 distance : 1.662 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-831 distance : 1.753 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-831)



  • Original Kopparapu Recent Venus for Star Kepler-831 distance : 0.741 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-831 distance : 0.965 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-831 distance : 0.980 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-831 distance : 1.691 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-831 distance : 1.758 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-831)



    (Position in Stellar Map of star Kepler-831 and its Exoplanet Kepler-831 b)



    (Zoomed position in Stellar Map of star Kepler-831 and its Exoplanet Kepler-831 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-831*)
    *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