Imaginary Picture of Kepler-1864 b

Display orbital revolution of Kepler-1864 b around the hoststar Kepler-1864
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Exoplanet Name : Kepler-1864 b
Alternate Name : "KOI-2636 b, KOI-2636.01"
Status : Confirmed
Radius (Rjup / Re): 0.0673 (Rjup) 0.7540 (Rearth)
Mass (Mjup / Me): 0.0011 (Mjup) 0.3600 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0488 (AU) 0.0488 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0106
Orbital Period(Observed/Estimated) 3.88 (Days Obs.) 3.88 (Days Est.)
Surface Gravity (G Earth) 0.6331
Star Radiation at Atmospheric Boundary: 612235.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1248.5 (K)
Blackbody T 0.3(K) 1172.4 (K)
Blackbody T 0.7(K) 948.6 (K)
Tidally Locked Blackbody T 0.1(K) 1484.7 (K)
Tidally Locked Blackbody T 0.3(K) 1394.3 (K)
Size Class: Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-1864
Alternate Name : "KIC 6198182, KOI-2636"
Star Distance(LY) : 974.9
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5758 (K)
Spectral type : G2V
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.5
Metalicity : 0.1
Absolute Magnitude: 4.7
Apparent Magnitude: 12.1
Right Ascension(RA) 289.6867
Declination (DEC) 41.5889
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-1864 b
Kepler-1864 b

  • Kepler-1864 b is an exoplanet orbiting the star Kepler-1864, located about 974.9 light-years (298.9 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1864 has apparent magnitude of 12.1, with absolute magnitude of 4.7.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5758 with its spectral types of G2V
  • In this planetary system, the extrasolar planet Kepler-1864 b orbits around the star Kepler-1864 every 3.9 days with its orbital distance of 0.05 AU ( 7300376.1 km)
  • (Projected orbit of Kepler-1864 b around its host star Kepler-1864)


  • The Star Kepler-1864 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.747 AU ( 111746717.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.033 AU ( 154463165.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.573 AU ( 235367682.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.315 AU ( 346353854.9 km)
  • Radiation at Planetary Boundary of Kepler-1864 b : 612235.47 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1864)



  • Kopparapu Recent Venus for Star Kepler-1864 distance : 0.775 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1864 distance : 0.982 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1864 distance : 0.948 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1864 distance : 1.039 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1864 distance : 1.734 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1864 distance : 1.829 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1864)



  • Original Kopparapu Recent Venus for Star Kepler-1864 distance : 0.776 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1864 distance : 1.009 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1864 distance : 1.027 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1864 distance : 1.765 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1864 distance : 1.835 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1864)



    (Position in Stellar Map of star Kepler-1864 and its Exoplanet Kepler-1864 b)



    (Zoomed position in Stellar Map of star Kepler-1864 and its Exoplanet Kepler-1864 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1864*)
    *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