Imaginary Picture of Kepler-1240 b

Display orbital revolution of Kepler-1240 b around the hoststar Kepler-1240
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Exoplanet Name : Kepler-1240 b
Alternate Name : "2MASS J18515993+4033268 b, K02440.01, KIC 5339567 b, KOI-2440 b, KOI-2440.01, WISE J185159.94+403326.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.1030 (Rjup) 1.1545 (Rearth)
Mass (Mjup / Me): 0.0052 (Mjup) 1.6403 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0558 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0133
Orbital Period(Observed/Estimated) 4.87 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.2306
Star Radiation at Atmospheric Boundary: 732493.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1305.7 (K)
Blackbody T 0.3(K) 1226.2 (K)
Blackbody T 0.7(K) 992.1 (K)
Tidally Locked Blackbody T 0.1(K) 1552.7 (K)
Tidally Locked Blackbody T 0.3(K) 1458.2 (K)
Size Class: 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-1240
Alternate Name : "2MASS J18515993+4033268, KIC 5339567, KOI-2440, WISE J185159.94+403326.7"
Star Distance(LY) : 2811.2
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.1 (GY)
Temperature : 5670 (K)
Spectral type : G4
UV portion[%]: 7.5
Visible portion[%]: 44.2
IR portion[%]: 48.2
Metalicity : 0.0
Absolute Magnitude: 3.1
Apparent Magnitude: 12.8
Right Ascension(RA) 282.9997
Declination (DEC) 40.5575
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha7"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 441 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1240+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1240%20b/
Kepler-1240 b
Kepler-1240 b

  • Kepler-1240 b is an exoplanet orbiting the star Kepler-1240, located about 2811.2 light-years (861.9 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1240 has apparent magnitude of 12.8, with absolute magnitude of 3.1.
  • It is 1.0 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 5670 with its spectral types of G4
  • In this planetary system, the extrasolar planet Kepler-1240 b orbits around the star Kepler-1240 every 4.9 days with its orbital distance of 0.06 AU ( 8351120.0 km)
  • (Projected orbit of Kepler-1240 b around its host star Kepler-1240)


  • The Star Kepler-1240 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.935 AU ( 139822398.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.292 AU ( 193271094.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.969 AU ( 294502376.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.897 AU ( 433373148.2 km)
  • Radiation at Planetary Boundary of Kepler-1240 b : 732492.96 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1240)



  • Kopparapu Recent Venus for Star Kepler-1240 distance : 0.975 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1240 distance : 1.235 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1240 distance : 1.192 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1240 distance : 1.308 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1240 distance : 2.187 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1240 distance : 2.307 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1240)



  • Original Kopparapu Recent Venus for Star Kepler-1240 distance : 0.974 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1240 distance : 1.269 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1240 distance : 1.289 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1240 distance : 2.225 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1240 distance : 2.314 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1240)



    (Position in Stellar Map of star Kepler-1240 and its Exoplanet Kepler-1240 b)



    (Zoomed position in Stellar Map of star Kepler-1240 and its Exoplanet Kepler-1240 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1240*)
    *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