Imaginary Picture of EPIC 248545986 b
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Exoplanet Name : EPIC 248545986 b
Alternate Name : K2-239 b
Radius (Rjup / Re): 0.0980 (Rjup) 1.0985 (Rearth)
Mass (Mjup / Me): 0.0044 (Mjup) 1.3989 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0441 (AU) 0.0441 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0143
Orbital Period(Observed/Estimated) 5.24 (Days Obs.) 5.35 (Days Est.)
Star Radiation at Atmospheric Boundary: 11179.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 458.9 (K)
Blackbody T 0.3(K) 431.0 (K)
Blackbody T 0.7(K) 348.7 (K)
Tidally Locked Blackbody T 0.1(K) 545.8 (K)
Tidally Locked Blackbody T 0.3(K) 512.5 (K)
Size Class: Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : EPIC 248545986
Alternate Name : K2-239
Star Distance(LY) : 159.8
Stellar Radius(Rsun) : 0.4 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3420 (K)
Spectral type : M5
Metalicity : -0.1
Absolute Magnitude: 11.1
Apparent Magnitude: 14.5
Right Ascension(RA) 160.5958
Declination (DEC) 4.4414
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
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SIMBAD LINK
Open Exoplanet Database Link
EPIC 248545986 b
EPIC 248545986 b

  • EPIC 248545986 b is an exoplanet orbiting the star EPIC 248545986, located about 159.8 light-years (49.0 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star EPIC 248545986 has apparent magnitude of 14.5, with absolute magnitude of 11.1.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3420 with its spectral types of M5
  • In this planetary system, the extrasolar planet EPIC 248545986 b orbits around the star EPIC 248545986 every 5.2 days with its orbital distance of 0.04 AU ( 6597266.1 km)
  • (Projected orbit of EPIC 248545986 b around its host star EPIC 248545986)


  • The Star EPIC 248545986 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.091 AU ( 13646234.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.126 AU ( 18862662.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.192 AU ( 28742522.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.283 AU ( 42295881.3 km)
  • Radiation at Planetary Boundary of EPIC 248545986 b : 11179.88 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 248545986)



  • Kopparapu Recent Venus for Star EPIC 248545986 distance : 0.103 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 248545986 distance : 0.131 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 248545986 distance : 0.126 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 248545986 distance : 0.139 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 248545986 distance : 0.255 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 248545986 distance : 0.269 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 248545986)



  • Original Kopparapu Recent Venus for Star EPIC 248545986 distance : 0.102 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 248545986 distance : 0.135 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 248545986 distance : 0.135 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 248545986 distance : 0.259 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 248545986 distance : 0.269 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 248545986)



    (Position in Stellar Map of star EPIC 248545986 and its Exoplanet EPIC 248545986 b)



    (Zoomed position in Stellar Map of star EPIC 248545986 and its Exoplanet EPIC 248545986 b (zoom level 3))