Imaginary Picture of EPIC 204221263 c
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Exoplanet Name : EPIC 204221263 c
Alternate Name :
Radius (Rjup / Re): 0.2160 (Rjup) 2.4211 (Rearth)
Mass (Mjup / Me): 0.0189 (Mjup) 6.0042 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0964 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0289
Orbital Period(Observed/Estimated) 10.56 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 175562.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 913.6 (K)
Blackbody T 0.3(K) 858.0 (K)
Blackbody T 0.7(K) 694.2 (K)
Tidally Locked Blackbody T 0.1(K) 1086.4 (K)
Tidally Locked Blackbody T 0.3(K) 1020.3 (K)
Size Class: sub-Neptune-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 : EPIC 204221263
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5757 (K)
Spectral type : G2V
Metalicity : 0.3
Absolute Magnitude: 25.0
Apparent Magnitude: 11.4
Right Ascension(RA) 240.0333
Declination (DEC) -23.1892
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK 0
Open Exoplanet Database Link
EPIC 204221263 c
EPIC 204221263 c

  • EPIC 204221263 c is an exoplanet orbiting the star EPIC 204221263. Its discovery was publicly announced on 2016.
  • The host star EPIC 204221263 has apparent magnitude of 11.4, with absolute magnitude of 25.0.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5757 with its spectral types of G2V
  • In this planetary system, the extrasolar planet EPIC 204221263 c orbits around the star EPIC 204221263 every 10.6 days with its orbital distance of 0.10 AU ( 14414426.6 km)
  • (Projected orbit of EPIC 204221263 c around its host star EPIC 204221263)


  • The Star EPIC 204221263 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.790 AU ( 118152592.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.092 AU ( 163317760.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.664 AU ( 248860124.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.448 AU ( 366208575.0 km)
  • Radiation at Planetary Boundary of EPIC 204221263 c : 175562.27 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 204221263)



  • Kopparapu Recent Venus for Star EPIC 204221263 distance : 0.820 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 204221263 distance : 1.038 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 204221263 distance : 1.002 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 204221263 distance : 1.099 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 204221263 distance : 1.834 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 204221263 distance : 1.934 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 204221263)



  • Original Kopparapu Recent Venus for Star EPIC 204221263 distance : 0.820 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 204221263 distance : 1.067 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 204221263 distance : 1.085 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 204221263 distance : 1.866 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 204221263 distance : 1.941 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 204221263)



    (Position in Stellar Map of star EPIC 204221263 and its Exoplanet EPIC 204221263 c)



    (Zoomed position in Stellar Map of star EPIC 204221263 and its Exoplanet EPIC 204221263 c (zoom level 3))