Imaginary Picture of Kepler-1203 b

Display orbital revolution of Kepler-1203 b around the hoststar Kepler-1203
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Exoplanet Name : Kepler-1203 b
Alternate Name : "2MASS J19310561+4410412 b, K02347.01, KIC 8235924 b, KOI-2347 b, KOI-2347.01, WISE J193105.62+441041.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.0950 (Rjup) 1.0649 (Rearth)
Mass (Mjup / Me): 0.0039 (Mjup) 1.2258 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0118 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0016
Orbital Period(Observed/Estimated) 0.59 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0811
Star Radiation at Atmospheric Boundary: 918122.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1381.6 (K)
Blackbody T 0.3(K) 1297.4 (K)
Blackbody T 0.7(K) 1049.8 (K)
Tidally Locked Blackbody T 0.1(K) 1643.0 (K)
Tidally Locked Blackbody T 0.3(K) 1542.9 (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-1203
Alternate Name : "2MASS J19310561+4410412, KIC 8235924, KOI-2347, WISE J193105.62+441041.1"
Star Distance(LY) : 1033.8
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 3.5 (GY)
Temperature : 3817 (K)
Spectral type : K6
UV portion[%]: 0.4
Visible portion[%]: 19.7
IR portion[%]: 79.9
Metalicity : 0.0
Absolute Magnitude: 5.4
Apparent Magnitude: 12.9
Right Ascension(RA) 292.7734
Declination (DEC) 44.1781
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-1203+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1203%20b/
Kepler-1203 b
Kepler-1203 b

  • Kepler-1203 b is an exoplanet orbiting the star Kepler-1203, located about 1033.8 light-years (317.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1203 has apparent magnitude of 12.9, with absolute magnitude of 5.4.
  • It is 0.6 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 3817 with its spectral types of K6
  • In this planetary system, the extrasolar planet Kepler-1203 b orbits around the star Kepler-1203 every 0.6 days with its orbital distance of 0.01 AU ( 1770831.3 km)
  • (Projected orbit of Kepler-1203 b around its host star Kepler-1203)


  • The Star Kepler-1203 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.222 AU ( 33193860.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.307 AU ( 45882589.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.467 AU ( 69914911.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.688 AU ( 102882855.7 km)
  • Radiation at Planetary Boundary of Kepler-1203 b : 918122.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1203)



  • Kopparapu Recent Venus for Star Kepler-1203 distance : 0.250 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1203 distance : 0.316 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1203 distance : 0.305 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1203 distance : 0.335 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1203 distance : 0.605 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1203 distance : 0.638 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1203)



  • Original Kopparapu Recent Venus for Star Kepler-1203 distance : 0.247 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1203 distance : 0.327 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1203 distance : 0.327 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1203 distance : 0.614 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1203 distance : 0.639 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1203)



    (Position in Stellar Map of star Kepler-1203 and its Exoplanet Kepler-1203 b)



    (Zoomed position in Stellar Map of star Kepler-1203 and its Exoplanet Kepler-1203 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1203*)
    *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