Imaginary Picture of Kepler-1238 b

Display orbital revolution of Kepler-1238 b around the hoststar Kepler-1238
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Exoplanet Name : Kepler-1238 b
Alternate Name : "2MASS J19513739+4009462 b, K02437.01, KIC 5036705 b, KOI-2437 b, KOI-2437.01, WISE J195137.39+400946.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.1720 (Rjup) 1.9279 (Rearth)
Mass (Mjup / Me): 0.0153 (Mjup) 4.8579 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0551 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0114
Orbital Period(Observed/Estimated) 4.15 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.3070
Star Radiation at Atmospheric Boundary: 1572738.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1580.5 (K)
Blackbody T 0.3(K) 1484.3 (K)
Blackbody T 0.7(K) 1201.0 (K)
Tidally Locked Blackbody T 0.1(K) 1879.6 (K)
Tidally Locked Blackbody T 0.3(K) 1765.1 (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-1238
Alternate Name : "2MASS J19513739+4009462, KIC 5036705, KOI-2437, WISE J195137.39+400946.1"
Star Distance(LY) : 5327.2
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 2.1 (GY)
Temperature : 6150 (K)
Spectral type : F7
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 2.6
Apparent Magnitude: 13.6
Right Ascension(RA) 297.9058
Declination (DEC) 40.1629
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. Batalha15"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 449 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1238+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1238%20b/
Kepler-1238 b
Kepler-1238 b

  • Kepler-1238 b is an exoplanet orbiting the star Kepler-1238, located about 5327.2 light-years (1633.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1238 has apparent magnitude of 13.6, with absolute magnitude of 2.6.
  • It is 1.3 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 6150 with its spectral types of F7
  • In this planetary system, the extrasolar planet Kepler-1238 b orbits around the star Kepler-1238 every 4.1 days with its orbital distance of 0.06 AU ( 8248915.6 km)
  • (Projected orbit of Kepler-1238 b around its host star Kepler-1238)


  • The Star Kepler-1238 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.353 AU ( 202374326.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.870 AU ( 279734206.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.849 AU ( 426253025.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.193 AU ( 627250000.2 km)
  • Radiation at Planetary Boundary of Kepler-1238 b : 1572738.51 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1238)



  • Kopparapu Recent Venus for Star Kepler-1238 distance : 1.371 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1238 distance : 1.736 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1238 distance : 1.676 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1238 distance : 1.837 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1238 distance : 3.039 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1238 distance : 3.205 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1238)



  • Original Kopparapu Recent Venus for Star Kepler-1238 distance : 1.383 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1238 distance : 1.782 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1238 distance : 1.830 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1238 distance : 3.093 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1238 distance : 3.217 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1238)



    (Position in Stellar Map of star Kepler-1238 and its Exoplanet Kepler-1238 b)



    (Zoomed position in Stellar Map of star Kepler-1238 and its Exoplanet Kepler-1238 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1238*)
    *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