Imaginary Picture of Kepler-240 b

Display orbital revolution of Kepler-240 b around the hoststar Kepler-240
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Exoplanet Name : Kepler-240 b
Alternate Name : "2MASS J19243810+4045009 b, K00837.02, KIC 5531576 b, KOI-837 b, KOI-837.02, WISE J192438.10+404500.8 b"
Status : Confirmed
Radius (Rjup / Re): 0.1220 (Rjup) 1.3675 (Rearth)
Mass (Mjup / Me): 0.0095 (Mjup) 3.0334 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0480 (AU) 0.0480 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0113
Orbital Period(Observed/Estimated) 4.14 (Days Obs.) 5.46 (Days Est.)
Surface Gravity (G Earth) 1.6221
Star Radiation at Atmospheric Boundary: 179847.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 919.1 (K)
Blackbody T 0.3(K) 863.1 (K)
Blackbody T 0.7(K) 698.4 (K)
Tidally Locked Blackbody T 0.1(K) 1093.0 (K)
Tidally Locked Blackbody T 0.3(K) 1026.5 (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-240
Alternate Name : "2MASS J19243810+4045009, KIC 5531576, KOI-837, WISE J192438.10+404500.8"
Star Distance(LY) : 2437.5
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4918 (K)
Spectral type : K2
UV portion[%]: 3.2
Visible portion[%]: 36.9
IR portion[%]: 59.9
Metalicity : 0.1
Absolute Magnitude: 4.7
Apparent Magnitude: 14.1
Right Ascension(RA) 291.1588
Declination (DEC) 40.7503
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-240+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-240%20b/
Kepler-240 b
Kepler-240 b

  • Kepler-240 b is an exoplanet orbiting the star Kepler-240, located about 2437.5 light-years (747.3 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-240 has apparent magnitude of 14.1, with absolute magnitude of 4.7.
  • It is 0.5 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4918 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-240 b orbits around the star Kepler-240 every 4.1 days with its orbital distance of 0.05 AU ( 7180697.8 km)
  • (Projected orbit of Kepler-240 b around its host star Kepler-240)


  • The Star Kepler-240 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.398 AU ( 59572901.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.550 AU ( 82345318.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.839 AU ( 125476042.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.234 AU ( 184643492.6 km)
  • Radiation at Planetary Boundary of Kepler-240 b : 179847.17 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-240)



  • Kopparapu Recent Venus for Star Kepler-240 distance : 0.432 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-240 distance : 0.548 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-240 distance : 0.529 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-240 distance : 0.580 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-240 distance : 0.996 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-240 distance : 1.050 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-240)



  • Original Kopparapu Recent Venus for Star Kepler-240 distance : 0.428 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-240 distance : 0.564 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-240 distance : 0.566 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-240 distance : 1.012 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-240 distance : 1.053 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-240)



    (Position in Stellar Map of star Kepler-240 and its Exoplanet Kepler-240 b)



    (Zoomed position in Stellar Map of star Kepler-240 and its Exoplanet Kepler-240 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-240*)
    *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