Imaginary Picture of K2-136 b
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Exoplanet Name : K2-136 b
Alternate Name : EPIC 247589423 b
Radius (Rjup / Re): 0.0880 (Rjup) 0.9864 (Rearth)
Mass (Mjup / Me): 0.0029 (Mjup) 0.9318 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0707 (AU Est.)
Eccentricity : 0.1000
Orbital Period(Yrs) 0.0218
Orbital Period(Observed/Estimated) 7.98 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 43832.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 645.8 (K)
Blackbody T 0.3(K) 606.5 (K)
Blackbody T 0.7(K) 490.7 (K)
Tidally Locked Blackbody T 0.1(K) 768.0 (K)
Tidally Locked Blackbody T 0.3(K) 721.2 (K)
Size Class: 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 : K2-136
Alternate Name : EPIC 247589423
Star Distance(LY) : 193.7
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4499 (K)
Spectral type : K5.5
Metalicity : 0.1
Absolute Magnitude: 7.3
Apparent Magnitude: 11.2
Right Ascension(RA) 67.4125
Declination (DEC) 22.8828
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
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SIMBAD LINK
Open Exoplanet Database Link
K2-136 b
K2-136 b

  • K2-136 b is an exoplanet orbiting the star K2-136, located about 193.7 light-years (59.4 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star K2-136 has apparent magnitude of 11.2, with absolute magnitude of 7.3.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4499 with its spectral types of K5.5
  • In this planetary system, the extrasolar planet K2-136 b orbits around the star K2-136 every 8.0 days with its orbital distance of 0.07 AU ( 10570776.7 km)
  • (Projected orbit of K2-136 b around its host star K2-136)


  • The Star K2-136 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.289 AU ( 43294630.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.400 AU ( 59844493.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.610 AU ( 91189764.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.897 AU ( 134189732.5 km)
  • Radiation at Planetary Boundary of K2-136 b : 43832.24 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-136)



  • Kopparapu Recent Venus for Star K2-136 distance : 0.320 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-136 distance : 0.405 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-136 distance : 0.391 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-136 distance : 0.429 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-136 distance : 0.750 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-136 distance : 0.791 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-136)



  • Original Kopparapu Recent Venus for Star K2-136 distance : 0.315 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-136 distance : 0.418 AU
  • Original Kopparapu Moist Greenhouse for Star K2-136 distance : 0.417 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-136 distance : 0.762 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-136 distance : 0.792 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-136)



    (Position in Stellar Map of star K2-136 and its Exoplanet K2-136 b)



    (Zoomed position in Stellar Map of star K2-136 and its Exoplanet K2-136 b (zoom level 3))