Imaginary Picture of Kepler-220 d

Display orbital revolution of Kepler-220 d around the hoststar Kepler-220
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Exoplanet Name : Kepler-220 d
Alternate Name : "2MASS J19260149+4653448 d, K00719.02, KIC 9950612 d, KOI-719 d, KOI-719.02, WISE J192601.46+465344.4 d"
Status : Confirmed
Radius (Rjup / Re): 0.0870 (Rjup) 0.9752 (Rearth)
Mass (Mjup / Me): 0.0028 (Mjup) 0.8945 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1630 (AU) 0.1630 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0770
Orbital Period(Observed/Estimated) 28.12 (Days Obs.) 24.53 (Days Est.)
Surface Gravity (G Earth) 0.9406
Star Radiation at Atmospheric Boundary: 10286.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 449.5 (K)
Blackbody T 0.3(K) 422.1 (K)
Blackbody T 0.7(K) 341.5 (K)
Tidally Locked Blackbody T 0.1(K) 534.5 (K)
Tidally Locked Blackbody T 0.3(K) 502.0 (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-220
Alternate Name : "2MASS J19260149+4653448, KIC 9950612, KOI-719, WISE J192601.46+465344.4"
Star Distance(LY) : 558.0
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4665 (K)
Spectral type : K4
UV portion[%]: 2.1
Visible portion[%]: 33.7
IR portion[%]: 64.2
Metalicity : 0.0
Absolute Magnitude: 5.0
Apparent Magnitude: 11.2
Right Ascension(RA) 291.5062
Declination (DEC) 46.8958
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-220+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-220%20d/
Kepler-220 d
Kepler-220 d
  • Kepler-220 d is an exoplanet orbiting the star Kepler-220, located about 558.0 light-years (171.1 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-220 has apparent magnitude of 11.2, with absolute magnitude of 5.0.
  • It is 1.0 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4665 with its spectral types of K4
  • In this planetary system, the extrasolar planet Kepler-220 d orbits around the star Kepler-220 every 28.1 days with its orbital distance of 0.16 AU ( 24384452.9 km)
    • (Projected orbit of Kepler-220 d around its host star Kepler-220)


  • The Star Kepler-220 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.323 AU ( 48382190.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.447 AU ( 66876830.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.681 AU ( 101905490.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.002 AU ( 149958392.8 km)
  • Radiation at Planetary Boundary of Kepler-220 d : 10286.90 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-220)



  • Kopparapu Recent Venus for Star Kepler-220 distance : 0.355 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-220 distance : 0.449 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-220 distance : 0.434 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-220 distance : 0.477 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-220 distance : 0.826 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-220 distance : 0.872 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-220)



  • Original Kopparapu Recent Venus for Star Kepler-220 distance : 0.350 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-220 distance : 0.464 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-220 distance : 0.464 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-220 distance : 0.840 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-220 distance : 0.873 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-220)



    (Position in Stellar Map of star Kepler-220 and its Exoplanet Kepler-220 d)



    (Zoomed position in Stellar Map of star Kepler-220 and its Exoplanet Kepler-220 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-220*)
    *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