Imaginary Picture of Kepler-1204 b

Display orbital revolution of Kepler-1204 b around the hoststar Kepler-1204
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Exoplanet Name : Kepler-1204 b
Alternate Name : "2MASS J19174595+4229532 b, K02348.01, KIC 6941084 b, KOI-2348 b, KOI-2348.01, WISE J191745.96+422953.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.2720 (Rjup) 3.0488 (Rearth)
Mass (Mjup / Me): 0.0234 (Mjup) 7.4398 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.3843 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.2347
Orbital Period(Observed/Estimated) 85.74 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.8004
Star Radiation at Atmospheric Boundary: 9761.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 443.6 (K)
Blackbody T 0.3(K) 416.6 (K)
Blackbody T 0.7(K) 337.1 (K)
Tidally Locked Blackbody T 0.1(K) 527.6 (K)
Tidally Locked Blackbody T 0.3(K) 495.4 (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-1204
Alternate Name : "2MASS J19174595+4229532, KIC 6941084, KOI-2348, WISE J191745.96+422953.2"
Star Distance(LY) : 3835.4
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.3 (GY)
Temperature : 6098 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 3.8
Apparent Magnitude: 14.1
Right Ascension(RA) 289.4415
Declination (DEC) 42.4981
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. Batalha2 "
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 428 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1204+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1204%20b/
Kepler-1204 b
Kepler-1204 b

  • Kepler-1204 b is an exoplanet orbiting the star Kepler-1204, located about 3835.4 light-years (1175.9 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1204 has apparent magnitude of 14.1, with absolute magnitude of 3.8.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 6098 with its spectral types of G2
  • In this planetary system, the extrasolar planet Kepler-1204 b orbits around the star Kepler-1204 every 85.7 days with its orbital distance of 0.38 AU ( 57488794.5 km)
  • (Projected orbit of Kepler-1204 b around its host star Kepler-1204)


  • The Star Kepler-1204 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.743 AU ( 111112744.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.027 AU ( 153586849.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.564 AU ( 234032370.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.302 AU ( 344388885.1 km)
  • Radiation at Planetary Boundary of Kepler-1204 b : 9761.14 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1204)



  • Kopparapu Recent Venus for Star Kepler-1204 distance : 0.755 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1204 distance : 0.956 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1204 distance : 0.923 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1204 distance : 1.012 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1204 distance : 1.675 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1204 distance : 1.767 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1204)



  • Original Kopparapu Recent Venus for Star Kepler-1204 distance : 0.761 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1204 distance : 0.981 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1204 distance : 1.007 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1204 distance : 1.705 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1204 distance : 1.774 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1204)



    (Position in Stellar Map of star Kepler-1204 and its Exoplanet Kepler-1204 b)



    (Zoomed position in Stellar Map of star Kepler-1204 and its Exoplanet Kepler-1204 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1204*)
    *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