Imaginary Picture of Kepler-71 b

Display orbital revolution of Kepler-71 b around the hoststar KOI-217
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Exoplanet Name : Kepler-71 b
Alternate Name : "2MASS J19392772+4617090 b, BOKS-1 b, K00217.01, KIC 9595827 b, KOI-217.01, WISE J193927.71+461708.9 b, KOI-217 b"
Status : Confirmed
Radius (Rjup / Re): 1.1100 (Rjup) 12.4421 (Rearth)
Mass (Mjup / Me): 1.3406 (Mjup) 426.2378 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0477 (AU) 0.0477 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0107
Orbital Period(Observed/Estimated) 3.91 (Days Obs.) 3.90 (Days Est.)
Surface Gravity (G Earth) 2.7534
Star Radiation at Atmospheric Boundary: 383896.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1111.0 (K)
Blackbody T 0.3(K) 1043.3 (K)
Blackbody T 0.7(K) 844.1 (K)
Tidally Locked Blackbody T 0.1(K) 1321.2 (K)
Tidally Locked Blackbody T 0.3(K) 1240.7 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KOI-217
Alternate Name : "2MASS J19392772+4617090, BOKS-1, KIC 9595827, Kepler-71, WISE J193927.71+461708.9"
Star Distance(LY) : 2982.6
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5545 (K)
Spectral type : G7
UV portion[%]: 7.1
Visible portion[%]: 43.5
IR portion[%]: 49.4
Metalicity : -0.2
Absolute Magnitude: 5.6
Apparent Magnitude: 15.4
Right Ascension(RA) 294.8655
Declination (DEC) 46.2859
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KOI-217&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-71 b
Kepler-71 b

  • Kepler-71 b is an exoplanet orbiting the star KOI-217, located about 2982.6 light-years (914.5 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star KOI-217 has apparent magnitude of 15.4, with absolute magnitude of 5.6.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5545 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-71 b orbits around the star KOI-217 every 3.9 days with its orbital distance of 0.05 AU ( 7135818.4 km)
  • (Projected orbit of Kepler-71 b around its host star KOI-217)


  • The Star KOI-217 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.578 AU ( 86492995.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.799 AU ( 119555923.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.218 AU ( 182176769.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.792 AU ( 268081096.7 km)
  • Radiation at Planetary Boundary of Kepler-71 b : 383896.10 W/m2

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



  • Kopparapu Recent Venus for Star KOI-217 distance : 0.608 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-217 distance : 0.769 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-217 distance : 0.743 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-217 distance : 0.815 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-217 distance : 1.368 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-217 distance : 1.443 AU

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



  • Original Kopparapu Recent Venus for Star KOI-217 distance : 0.606 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-217 distance : 0.791 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-217 distance : 0.801 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-217 distance : 1.391 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-217 distance : 1.447 AU

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



    (Position in Stellar Map of star KOI-217 and its Exoplanet Kepler-71 b)



    (Zoomed position in Stellar Map of star KOI-217 and its Exoplanet Kepler-71 b (zoom level 3))

    (Synthetic Spectrum of star KOI-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