Imaginary Picture of Kepler-938 b

Display orbital revolution of Kepler-938 b around the hoststar Kepler-938
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Exoplanet Name : Kepler-938 b
Alternate Name : "2MASS J19390939+4659023 b, K01721.01, KIC 10019065 b, KOI-1721 b, KOI-1721.01, WISE J193909.38+465902.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.1980 (Rjup) 2.2194 (Rearth)
Mass (Mjup / Me): 0.0174 (Mjup) 5.5374 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.2673 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1441
Orbital Period(Observed/Estimated) 52.63 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.1242
Star Radiation at Atmospheric Boundary: 28634.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 580.6 (K)
Blackbody T 0.3(K) 545.2 (K)
Blackbody T 0.7(K) 441.1 (K)
Tidally Locked Blackbody T 0.1(K) 690.4 (K)
Tidally Locked Blackbody T 0.3(K) 648.4 (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-938
Alternate Name : "2MASS J19390939+4659023, KIC 10019065, KOI-1721, WISE J193909.38+465902.2"
Star Distance(LY) : 3490.8
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.3 (GY)
Temperature : 5339 (K)
Spectral type : G7
UV portion[%]: 7.0
Visible portion[%]: 43.4
IR portion[%]: 49.5
Metalicity : -0.0
Absolute Magnitude: 3.6
Apparent Magnitude: 13.7
Right Ascension(RA) 294.7891
Declination (DEC) 46.9840
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton, Stephen T. Bryson, Jeffrey L. Coughlin, Jason F. Rowe, Ganesh Ravichandran, Erik A. Petigura, Michael R. Haas, and Natalie M. Batalha"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 754 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-938%20b/
Kepler-938 b
Kepler-938 b

  • Kepler-938 b is an exoplanet orbiting the star Kepler-938, located about 3490.8 light-years (1070.3 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-938 has apparent magnitude of 13.7, with absolute magnitude of 3.6.
  • It is 0.9 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 5339 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-938 b orbits around the star Kepler-938 every 52.6 days with its orbital distance of 0.27 AU ( 39989801.4 km)
  • (Projected orbit of Kepler-938 b around its host star Kepler-938)


  • The Star Kepler-938 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.885 AU ( 132380538.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.223 AU ( 182984499.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.864 AU ( 278827883.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.743 AU ( 410307445.1 km)
  • Radiation at Planetary Boundary of Kepler-938 b : 28634.47 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-938)



  • Kopparapu Recent Venus for Star Kepler-938 distance : 0.941 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-938 distance : 1.191 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-938 distance : 1.151 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-938 distance : 1.262 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-938 distance : 2.132 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-938 distance : 2.249 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-938)



  • Original Kopparapu Recent Venus for Star Kepler-938 distance : 0.935 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-938 distance : 1.226 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-938 distance : 1.237 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-938 distance : 2.168 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-938 distance : 2.255 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-938)



    (Position in Stellar Map of star Kepler-938 and its Exoplanet Kepler-938 b)



    (Zoomed position in Stellar Map of star Kepler-938 and its Exoplanet Kepler-938 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-938*)
    *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