Imaginary Picture of K2-264 b
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Exoplanet Name : K2-264 b
Alternate Name : EPIC 211964830 b
Radius (Rjup / Re): 0.2025 (Rjup) 2.2698 (Rearth)
Mass (Mjup / Me): 0.0178 (Mjup) 5.6544 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0502 (AU) 0.0502 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0160
Orbital Period(Observed/Estimated) 5.84 (Days Obs.) 5.99 (Days Est.)
Star Radiation at Atmospheric Boundary: 17862.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 516.0 (K)
Blackbody T 0.3(K) 484.6 (K)
Blackbody T 0.7(K) 392.1 (K)
Tidally Locked Blackbody T 0.1(K) 613.6 (K)
Tidally Locked Blackbody T 0.3(K) 576.2 (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 211964830
Alternate Name : "K2-264, 2MASS J08452605+1941544"
Star Distance(LY) : 608.6
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3580 (K)
Spectral type : M2.5
Metalicity : 0.1
Absolute Magnitude: 15.6
Apparent Magnitude: 22.0
Right Ascension(RA) 131.3584
Declination (DEC) 19.6984
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
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SIMBAD LINK
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K2-264 b
K2-264 b

  • K2-264 b is an exoplanet orbiting the star EPIC 211964830, located about 608.6 light-years (186.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star EPIC 211964830 has apparent magnitude of 22.0, with absolute magnitude of 15.6.
  • It is 0.5 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3580 with its spectral types of M2.5
  • In this planetary system, the extrasolar planet K2-264 b orbits around the star EPIC 211964830 every 5.8 days with its orbital distance of 0.05 AU ( 7514301.0 km)
  • (Projected orbit of K2-264 b around its host star EPIC 211964830)


  • The Star EPIC 211964830 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.131 AU ( 19646505.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.182 AU ( 27156604.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.277 AU ( 41380655.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.407 AU ( 60893447.1 km)
  • Radiation at Planetary Boundary of K2-264 b : 17862.11 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 211964830)



  • Kopparapu Recent Venus for Star EPIC 211964830 distance : 0.148 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 211964830 distance : 0.188 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 211964830 distance : 0.181 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 211964830 distance : 0.199 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 211964830 distance : 0.364 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 211964830 distance : 0.384 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 211964830)



  • Original Kopparapu Recent Venus for Star EPIC 211964830 distance : 0.147 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 211964830 distance : 0.194 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 211964830 distance : 0.194 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 211964830 distance : 0.369 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 211964830 distance : 0.384 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 211964830)



    (Position in Stellar Map of star EPIC 211964830 and its Exoplanet K2-264 b)



    (Zoomed position in Stellar Map of star EPIC 211964830 and its Exoplanet K2-264 b (zoom level 3))