Imaginary Picture of Kepler-231 b

Display orbital revolution of Kepler-231 b around the hoststar Kepler-231
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Exoplanet Name : Kepler-231 b
Alternate Name : "2MASS J19355360+5031548 b, K00784.02, KIC 12066335 b, KOI-784 b, KOI-784.02, WISE J193553.61+503154.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.1540 (Rjup) 1.7262 (Rearth)
Mass (Mjup / Me): 0.0138 (Mjup) 4.3833 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0740 (AU) 0.0740 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0276
Orbital Period(Observed/Estimated) 10.07 (Days Obs.) 9.65 (Days Est.)
Surface Gravity (G Earth) 1.4711
Star Radiation at Atmospheric Boundary: 21413.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 539.9 (K)
Blackbody T 0.3(K) 507.0 (K)
Blackbody T 0.7(K) 410.2 (K)
Tidally Locked Blackbody T 0.1(K) 642.1 (K)
Tidally Locked Blackbody T 0.3(K) 603.0 (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-231
Alternate Name : "2MASS J19355360+5031548, KIC 12066335, KOI-784, WISE J193553.61+503154.7"
Star Distance(LY) : 1032.6
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4078 (K)
Spectral type : M1 V
UV portion[%]: 0.8
Visible portion[%]: 25.7
IR portion[%]: 73.5
Metalicity : -0.0
Absolute Magnitude: 5.9
Apparent Magnitude: 13.4
Right Ascension(RA) 293.9734
Declination (DEC) 50.5319
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-231+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-231%20b/
Kepler-231 b
Kepler-231 b
  • Kepler-231 b is an exoplanet orbiting the star Kepler-231, located about 1032.6 light-years (316.6 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-231 has apparent magnitude of 13.4, with absolute magnitude of 5.9.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4078 with its spectral types of M1 V
  • In this planetary system, the extrasolar planet Kepler-231 b orbits around the star Kepler-231 every 10.1 days with its orbital distance of 0.07 AU ( 11070242.4 km)
    • (Projected orbit of Kepler-231 b around its host star Kepler-231)


  • The Star Kepler-231 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.212 AU ( 31690557.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.293 AU ( 43804632.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.446 AU ( 66748565.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.657 AU ( 98223438.7 km)
  • Radiation at Planetary Boundary of Kepler-231 b : 21413.36 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-231)



  • Kopparapu Recent Venus for Star Kepler-231 distance : 0.237 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-231 distance : 0.300 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-231 distance : 0.290 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-231 distance : 0.318 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-231 distance : 0.567 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-231 distance : 0.598 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-231)



  • Original Kopparapu Recent Venus for Star Kepler-231 distance : 0.234 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-231 distance : 0.310 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-231 distance : 0.310 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-231 distance : 0.576 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-231 distance : 0.599 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-231)



    (Position in Stellar Map of star Kepler-231 and its Exoplanet Kepler-231 b)



    (Zoomed position in Stellar Map of star Kepler-231 and its Exoplanet Kepler-231 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-231*)
    *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