Imaginary Picture of Kepler-218 c

Display orbital revolution of Kepler-218 c around the hoststar Kepler-218
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Exoplanet Name : Kepler-218 c
Alternate Name : "2MASS J19413907+4615592 c, K00711.01, KIC 9597345 c, KOI-711 c, KOI-711.01, WISE J194139.08+461559.6 c"
Status : Confirmed
Radius (Rjup / Re): 0.2800 (Rjup) 3.1385 (Rearth)
Mass (Mjup / Me): 0.0240 (Mjup) 7.6431 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2480 (AU) 0.2480 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1224
Orbital Period(Observed/Estimated) 44.70 (Days Obs.) 43.81 (Days Est.)
Surface Gravity (G Earth) 0.7759
Star Radiation at Atmospheric Boundary: 21649.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 541.4 (K)
Blackbody T 0.3(K) 508.4 (K)
Blackbody T 0.7(K) 411.4 (K)
Tidally Locked Blackbody T 0.1(K) 643.8 (K)
Tidally Locked Blackbody T 0.3(K) 604.6 (K)
Size Class: 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 : "2MASS J19413907+4615592, KIC 9597345, KOI-711, WISE J194139.08+461559.6"
Star Distance(LY) : 2139.8
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5594 (K)
Spectral type : G7
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.2
Absolute Magnitude: 3.6
Apparent Magnitude: 12.7
Right Ascension(RA) 295.4128
Declination (DEC) 46.2665
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-218+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-218%20c/
Kepler-218 c
Kepler-218 c

  • Kepler-218 c is an exoplanet orbiting the star Kepler-218, located about 2139.8 light-years (656.1 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-218 has apparent magnitude of 12.7, with absolute magnitude of 3.6.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5594 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-218 c orbits around the star Kepler-218 every 44.7 days with its orbital distance of 0.25 AU ( 37100271.9 km)
  • (Projected orbit of Kepler-218 c 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 ) : 0.714 AU ( 106790201.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.987 AU ( 147611966.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.504 AU ( 224927970.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.213 AU ( 330991362.4 km)
  • Radiation at Planetary Boundary of Kepler-218 c : 21649.51 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 : 0.748 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-218 distance : 0.947 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-218 distance : 0.915 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-218 distance : 1.003 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-218 distance : 1.681 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-218 distance : 1.773 AU

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



  • Original Kopparapu Recent Venus for Star Kepler-218 distance : 0.746 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-218 distance : 0.974 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-218 distance : 0.988 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-218 distance : 1.711 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-218 distance : 1.779 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 c)



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

    (Synthetic Spectrum of star Kepler-218*)
    *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