Imaginary Picture of Kepler-139 d

Display orbital revolution of Kepler-139 d around the hoststar Kepler-139
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Exoplanet Name : Kepler-139 d
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.6950 (Rjup) 18.9993 (Rearth)
Mass (Mjup / Me): 0.0147 (Mjup) 4.6610 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0760 (AU) 0.0760 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0200
Orbital Period(Observed/Estimated) 7.31 (Days Obs.) 7.36 (Days Est.)
Surface Gravity (G Earth) 0.0129
Star Radiation at Atmospheric Boundary: 351361.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1086.6 (K)
Blackbody T 0.3(K) 1020.5 (K)
Blackbody T 0.7(K) 825.7 (K)
Tidally Locked Blackbody T 0.1(K) 1292.2 (K)
Tidally Locked Blackbody T 0.3(K) 1213.5 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : "Radial Velocity, Primary Transit"
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-139
Alternate Name : "2MASS J18493406+4353216, KIC 8008067, KOI-316, WISE J184934.03+435320.8"
Star Distance(LY) : 1289.8
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5594 (K)
Spectral type : G6
UV portion[%]: 7.2
Visible portion[%]: 43.8
IR portion[%]: 48.9
Metalicity : 0.2
Absolute Magnitude: 3.5
Apparent Magnitude: 11.5
Right Ascension(RA) 282.3920
Declination (DEC) 43.8894
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-139 d
Kepler-139 d

  • Kepler-139 d is an exoplanet orbiting the star Kepler-139, located about 1289.8 light-years (395.4 pc) away from Solar System. Its discovery was publicly announced on 2023.
  • The host star Kepler-139 has apparent magnitude of 11.5, with absolute magnitude of 3.5.
  • It is 1.1 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 5594 with its spectral types of G6
  • In this planetary system, the extrasolar planet Kepler-139 d orbits around the star Kepler-139 every 7.3 days with its orbital distance of 0.08 AU ( 11369438.2 km)
  • (Projected orbit of Kepler-139 d around its host star Kepler-139)


  • The Star Kepler-139 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.881 AU ( 131839755.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.218 AU ( 182236995.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.856 AU ( 277688852.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.732 AU ( 408631311.7 km)
  • Radiation at Planetary Boundary of Kepler-139 d : 351361.51 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-139)



  • Kopparapu Recent Venus for Star Kepler-139 distance : 0.923 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-139 distance : 1.169 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-139 distance : 1.129 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-139 distance : 1.238 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-139 distance : 2.076 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-139 distance : 2.189 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-139)



  • Original Kopparapu Recent Venus for Star Kepler-139 distance : 0.921 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-139 distance : 1.202 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-139 distance : 1.219 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-139 distance : 2.112 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-139 distance : 2.196 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-139)



    (Position in Stellar Map of star Kepler-139 and its Exoplanet Kepler-139 d)



    (Zoomed position in Stellar Map of star Kepler-139 and its Exoplanet Kepler-139 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-139*)
    *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