Imaginary Picture of Kepler-218 d
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Exoplanet Name : Kepler-218 d
Alternate Name :
Radius (Rjup / Re): 0.2370 (Rjup) 2.6565 (Rearth)
Mass (Mjup / Me): 0.0206 (Mjup) 6.5453 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.3767 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.3409
Orbital Period(Observed/Estimated) 124.52 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 8896.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 433.5 (K)
Blackbody T 0.3(K) 407.1 (K)
Blackbody T 0.7(K) 329.4 (K)
Tidally Locked Blackbody T 0.1(K) 515.5 (K)
Tidally Locked Blackbody T 0.3(K) 484.1 (K)
Size Class: sub-Neptune-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-218
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5502 (K)
Spectral type : G7
Metalicity : 0.2
Absolute Magnitude: 25.0
Apparent Magnitude: 12.7
Right Ascension(RA) 295.4128
Declination (DEC) 46.2665
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
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-218+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-218%20d/
Kepler-218 d
Kepler-218 d

  • Kepler-218 d is an exoplanet orbiting the star Kepler-218. Its discovery was publicly announced on 2016.
  • The host star Kepler-218 has apparent magnitude of 12.7, with absolute magnitude of 25.0.
  • It is 0.5 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5502 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-218 d orbits around the star Kepler-218 every 124.5 days with its orbital distance of 0.38 AU ( 56357838.5 km)
  • (Projected orbit of Kepler-218 d around its host star Kepler-218)


  • The Star Kepler-218 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.695 AU ( 103993249.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.961 AU ( 143745847.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.464 AU ( 219036861.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.155 AU ( 322322336.6 km)
  • Radiation at Planetary Boundary of Kepler-218 d : 8896.95 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-218)



  • Kopparapu Recent Venus for Star Kepler-218 distance : 0.732 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-218 distance : 0.927 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-218 distance : 0.896 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-218 distance : 0.982 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-218 distance : 1.651 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-218 distance : 1.741 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-218)



  • Original Kopparapu Recent Venus for Star Kepler-218 distance : 0.730 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-218 distance : 0.954 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-218 distance : 0.965 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-218 distance : 1.679 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-218 distance : 1.746 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-218)



    (Position in Stellar Map of star Kepler-218 and its Exoplanet Kepler-218 d)



    (Zoomed position in Stellar Map of star Kepler-218 and its Exoplanet Kepler-218 d (zoom level 3))