Imaginary Picture of EPIC 249801827 c
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Exoplanet Name : EPIC 249801827 c
Alternate Name : K2-240 c
Radius (Rjup / Re): 0.1610 (Rjup) 1.8046 (Rearth)
Mass (Mjup / Me): 0.0145 (Mjup) 4.6101 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1159 (AU) 0.1159 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0562
Orbital Period(Observed/Estimated) 20.52 (Days Obs.) 18.92 (Days Est.)
Star Radiation at Atmospheric Boundary: 5609.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 386.3 (K)
Blackbody T 0.3(K) 362.7 (K)
Blackbody T 0.7(K) 293.5 (K)
Tidally Locked Blackbody T 0.1(K) 459.3 (K)
Tidally Locked Blackbody T 0.3(K) 431.4 (K)
Size Class: super-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 249801827
Alternate Name : K2-240
Star Distance(LY) : 228.3
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3810 (K)
Spectral type : M0
Metalicity : -0.1
Absolute Magnitude: 9.7
Apparent Magnitude: 13.9
Right Ascension(RA) 227.8500
Declination (DEC) 17.8753
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
EPIC 249801827 c
EPIC 249801827 c

  • EPIC 249801827 c is an exoplanet orbiting the star EPIC 249801827, located about 228.3 light-years (70.0 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star EPIC 249801827 has apparent magnitude of 13.9, with absolute magnitude of 9.7.
  • It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3810 with its spectral types of M0
  • In this planetary system, the extrasolar planet EPIC 249801827 c orbits around the star EPIC 249801827 every 20.5 days with its orbital distance of 0.12 AU ( 17338393.2 km)
  • (Projected orbit of EPIC 249801827 c around its host star EPIC 249801827)


  • The Star EPIC 249801827 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.170 AU ( 25403983.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.235 AU ( 35114944.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.358 AU ( 53507404.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.526 AU ( 78738489.0 km)
  • Radiation at Planetary Boundary of EPIC 249801827 c : 5609.52 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 249801827)



  • Kopparapu Recent Venus for Star EPIC 249801827 distance : 0.191 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 249801827 distance : 0.242 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 249801827 distance : 0.233 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 249801827 distance : 0.257 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 249801827 distance : 0.463 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 249801827 distance : 0.489 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 249801827)



  • Original Kopparapu Recent Venus for Star EPIC 249801827 distance : 0.189 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 249801827 distance : 0.250 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 249801827 distance : 0.250 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 249801827 distance : 0.470 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 249801827 distance : 0.489 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 249801827)



    (Position in Stellar Map of star EPIC 249801827 and its Exoplanet EPIC 249801827 c)



    (Zoomed position in Stellar Map of star EPIC 249801827 and its Exoplanet EPIC 249801827 c (zoom level 3))