Imaginary Picture of Kepler-1217 b

Display orbital revolution of Kepler-1217 b around the hoststar Kepler-1217
/
Exoplanet Name : Kepler-1217 b
Alternate Name : "2MASS J19164480+5056152 b, K02387.01, KIC 12254378 b, KOI-2387 b, KOI-2387.01, WISE J191644.80+505615.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.1780 (Rjup) 1.9952 (Rearth)
Mass (Mjup / Me): 0.0158 (Mjup) 5.0153 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0320 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0056
Orbital Period(Observed/Estimated) 2.03 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.2599
Star Radiation at Atmospheric Boundary: 1845190.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1645.0 (K)
Blackbody T 0.3(K) 1544.8 (K)
Blackbody T 0.7(K) 1249.9 (K)
Tidally Locked Blackbody T 0.1(K) 1956.2 (K)
Tidally Locked Blackbody T 0.3(K) 1837.1 (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-1217
Alternate Name : "2MASS J19164480+5056152, KIC 12254378, KOI-2387, WISE J191644.80+505615.2"
Star Distance(LY) : 4411.0
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 3.8 (GY)
Temperature : 6151 (K)
Spectral type : G1
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 3.5
Apparent Magnitude: 14.1
Right Ascension(RA) 289.1867
Declination (DEC) 50.9376
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha14"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 440 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1217+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1217%20b/
Kepler-1217 b
Kepler-1217 b

  • Kepler-1217 b is an exoplanet orbiting the star Kepler-1217, located about 4411.0 light-years (1352.4 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1217 has apparent magnitude of 14.1, with absolute magnitude of 3.5.
  • It is 1.1 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 6151 with its spectral types of G1
  • In this planetary system, the extrasolar planet Kepler-1217 b orbits around the star Kepler-1217 every 2.0 days with its orbital distance of 0.03 AU ( 4789564.2 km)
  • (Projected orbit of Kepler-1217 b around its host star Kepler-1217)


  • The Star Kepler-1217 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.851 AU ( 127276117.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.176 AU ( 175928856.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.792 AU ( 268076643.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.637 AU ( 394486524.9 km)
  • Radiation at Planetary Boundary of Kepler-1217 b : 1845190.67 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1217)



  • Kopparapu Recent Venus for Star Kepler-1217 distance : 0.862 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1217 distance : 1.092 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1217 distance : 1.054 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1217 distance : 1.155 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1217 distance : 1.911 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1217 distance : 2.015 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1217)



  • Original Kopparapu Recent Venus for Star Kepler-1217 distance : 0.870 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1217 distance : 1.120 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1217 distance : 1.151 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1217 distance : 1.945 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1217 distance : 2.023 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1217)



    (Position in Stellar Map of star Kepler-1217 and its Exoplanet Kepler-1217 b)



    (Zoomed position in Stellar Map of star Kepler-1217 and its Exoplanet Kepler-1217 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1217*)
    *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