Imaginary Picture of Kepler-1038 c

Display orbital revolution of Kepler-1038 c around the hoststar Kepler-1038
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Exoplanet Name : Kepler-1038 c
Alternate Name : "KOI-1986 c, KOI-1986.02"
Status : Confirmed
Radius (Rjup / Re): 0.1263 (Rjup) 1.4160 (Rearth)
Mass (Mjup / Me): 0.0108 (Mjup) 3.4459 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0692 (AU) 0.0692 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0195
Orbital Period(Observed/Estimated) 7.13 (Days Obs.) 7.05 (Days Est.)
Surface Gravity (G Earth) 1.7185
Star Radiation at Atmospheric Boundary: 123377.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 836.5 (K)
Blackbody T 0.3(K) 785.5 (K)
Blackbody T 0.7(K) 635.6 (K)
Tidally Locked Blackbody T 0.1(K) 994.7 (K)
Tidally Locked Blackbody T 0.3(K) 934.2 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-1038
Alternate Name : "KIC 8257205, KOI-1986, WISE J195553.32+440756.6, TIC 268483792"
Star Distance(LY) : 1905.2
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.3 (GY)
Temperature : 5238 (K)
Spectral type : G8V
UV portion[%]: 5.3
Visible portion[%]: 40.7
IR portion[%]: 54.0
Metalicity : -0.0
Absolute Magnitude: 4.5
Apparent Magnitude: 13.4
Right Ascension(RA) 298.9722
Declination (DEC) 44.1324
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-1038 c
Kepler-1038 c

  • Kepler-1038 c is an exoplanet orbiting the star Kepler-1038, located about 1905.2 light-years (584.1 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-1038 has apparent magnitude of 13.4, with absolute magnitude of 4.5.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5238 with its spectral types of G8V
  • In this planetary system, the extrasolar planet Kepler-1038 c orbits around the star Kepler-1038 every 7.1 days with its orbital distance of 0.07 AU ( 10352172.7 km)
  • (Projected orbit of Kepler-1038 c around its host star Kepler-1038)


  • The Star Kepler-1038 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.476 AU ( 71134304.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.657 AU ( 98326198.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.002 AU ( 149827366.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.474 AU ( 220477532.8 km)
  • Radiation at Planetary Boundary of Kepler-1038 c : 123377.10 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1038)



  • Kopparapu Recent Venus for Star Kepler-1038 distance : 0.508 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1038 distance : 0.644 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1038 distance : 0.622 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1038 distance : 0.682 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1038 distance : 1.156 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1038 distance : 1.219 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1038)



  • Original Kopparapu Recent Venus for Star Kepler-1038 distance : 0.504 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1038 distance : 0.663 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1038 distance : 0.667 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1038 distance : 1.176 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1038 distance : 1.223 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1038)



    (Position in Stellar Map of star Kepler-1038 and its Exoplanet Kepler-1038 c)



    (Zoomed position in Stellar Map of star Kepler-1038 and its Exoplanet Kepler-1038 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-1038*)
    *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