Imaginary Picture of K2-263 b
/
Exoplanet Name : K2-263 b
Alternate Name : EPIC211682544 b
Radius (Rjup / Re): 0.2150 (Rjup) 2.4099 (Rearth)
Mass (Mjup / Me): 0.0466 (Mjup) 14.8159 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2573 (AU) 0.2573 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.1391
Orbital Period(Observed/Estimated) 50.82 (Days Obs.) 50.82 (Days Est.)
Star Radiation at Atmospheric Boundary: 11112.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 458.2 (K)
Blackbody T 0.3(K) 430.3 (K)
Blackbody T 0.7(K) 348.2 (K)
Tidally Locked Blackbody T 0.1(K) 544.9 (K)
Tidally Locked Blackbody T 0.3(K) 511.8 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-263
Alternate Name : "EPIC211682544, 2-MASS J08384378+1540503"
Star Distance(LY) : 532.3
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 7.0 (GY)
Temperature : 5368 (K)
Spectral type : G9V
Metalicity : -0.1
Absolute Magnitude: 5.5
Apparent Magnitude: 11.6
Right Ascension(RA) 129.6824
Declination (DEC) 15.6807
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
K2-263 b
K2-263 b

  • K2-263 b is an exoplanet orbiting the star K2-263, located about 532.3 light-years (163.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-263 has apparent magnitude of 11.6, with absolute magnitude of 5.5.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5368 with its spectral types of G9V
  • In this planetary system, the extrasolar planet K2-263 b orbits around the star K2-263 every 50.8 days with its orbital distance of 0.26 AU ( 38491532.1 km)
  • (Projected orbit of K2-263 b around its host star K2-263)


  • The Star K2-263 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.531 AU ( 79378347.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.733 AU ( 109721620.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.118 AU ( 167191467.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.645 AU ( 246029568.7 km)
  • Radiation at Planetary Boundary of K2-263 b : 11112.53 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-263)



  • Kopparapu Recent Venus for Star K2-263 distance : 0.563 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-263 distance : 0.713 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-263 distance : 0.689 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-263 distance : 0.755 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-263 distance : 1.275 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-263 distance : 1.345 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-263)



  • Original Kopparapu Recent Venus for Star K2-263 distance : 0.560 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-263 distance : 0.734 AU
  • Original Kopparapu Moist Greenhouse for Star K2-263 distance : 0.741 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-263 distance : 1.297 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-263 distance : 1.349 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-263)



    (Position in Stellar Map of star K2-263 and its Exoplanet K2-263 b)



    (Zoomed position in Stellar Map of star K2-263 and its Exoplanet K2-263 b (zoom level 3))