Imaginary Picture of Kepler-217 b

Display orbital revolution of Kepler-217 b around the hoststar Kepler-217
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Exoplanet Name : Kepler-217 b
Alternate Name : "2MASS J19320905+4616390 b, K00710.01, KIC 9590976 b, KOI-710 b, KOI-710.01, WISE J193209.05+461639.1 b"
Radius (Rjup / Re): 0.1990 (Rjup) 2.2306 (Rearth)
Mass (Mjup / Me): 0.0175 (Mjup) 5.5634 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0650 (AU) 0.0650 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0147
Orbital Period(Observed/Estimated) 5.37 (Days Obs.) 7.64 (Days Est.)
Surface Gravity (G Earth) 1.1182
Star Radiation at Atmospheric Boundary: 1731343.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1619.0 (K)
Blackbody T 0.3(K) 1520.4 (K)
Blackbody T 0.7(K) 1230.2 (K)
Tidally Locked Blackbody T 0.1(K) 1925.3 (K)
Tidally Locked Blackbody T 0.3(K) 1808.0 (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-217
Alternate Name : "2MASS J19320905+4616390, KIC 9590976, KOI-710, WISE J193209.05+461639.1"
Star Distance(LY) : 3600.3
Stellar Radius(Rsun) : 1.8 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6554 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 2.1
Apparent Magnitude: 12.3
Right Ascension(RA) 293.0377
Declination (DEC) 46.2775
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-217+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-217%20b/
Kepler-217 b
Kepler-217 b

  • Kepler-217 b is an exoplanet orbiting the star Kepler-217, located about 3600.3 light-years (1103.9 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-217 has apparent magnitude of 12.3, with absolute magnitude of 2.1.
  • It is 0.6 times more massive and 1.8 times bigger compared with our Sun. The surface temperature is 6554 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-217 b orbits around the star Kepler-217 every 5.4 days with its orbital distance of 0.07 AU ( 9723861.6 km)
  • (Projected orbit of Kepler-217 b around its host star Kepler-217)


  • The Star Kepler-217 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.673 AU ( 250299898.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.313 AU ( 345979871.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.524 AU ( 527196758.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.186 AU ( 775793125.3 km)
  • Radiation at Planetary Boundary of Kepler-217 b : 1731343.42 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-217)



  • Kopparapu Recent Venus for Star Kepler-217 distance : 1.655 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-217 distance : 2.096 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-217 distance : 2.024 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-217 distance : 2.218 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-217 distance : 3.644 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-217 distance : 3.843 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-217)



  • Original Kopparapu Recent Venus for Star Kepler-217 distance : 1.685 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-217 distance : 2.149 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-217 distance : 2.230 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-217 distance : 3.710 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-217 distance : 3.858 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-217)



    (Position in Stellar Map of star Kepler-217 and its Exoplanet Kepler-217 b)



    (Zoomed position in Stellar Map of star Kepler-217 and its Exoplanet Kepler-217 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-217*)
    *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