Imaginary Picture of K2-63 b

Display orbital revolution of K2-63 b around the hoststar K2-63
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Exoplanet Name : K2-63 b
Alternate Name : "2MASS J22134239-1203587 b, EPIC 206101302 b, EPIC 206101302.02, WISE J221342.41-120358.8 b"
Status : Confirmed
Radius (Rjup / Re): 0.2870 (Rjup) 3.2170 (Rearth)
Mass (Mjup / Me): 0.0246 (Mjup) 7.8206 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1627 (AU) 0.1627 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0555
Orbital Period(Observed/Estimated) 20.26 (Days Obs.) 20.26 (Days Est.)
Surface Gravity (G Earth) 0.7557
Star Radiation at Atmospheric Boundary: 258711.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1006.6 (K)
Blackbody T 0.3(K) 945.3 (K)
Blackbody T 0.7(K) 764.8 (K)
Tidally Locked Blackbody T 0.1(K) 1197.0 (K)
Tidally Locked Blackbody T 0.3(K) 1124.1 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-63
Alternate Name : "2MASS J22134239-1203587, EPIC 206101302, WISE J221342.41-120358.8"
Star Distance(LY) : 1674.9
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6771 (K)
Spectral type : F4
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 3.1
Apparent Magnitude: 11.6
Right Ascension(RA) 333.4267
Declination (DEC) -12.0664
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-63+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-63 b
K2-63 b

  • K2-63 b is an exoplanet orbiting the star K2-63, located about 1674.9 light-years (513.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-63 has apparent magnitude of 11.6, with absolute magnitude of 3.1.
  • It is 1.4 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 6771 with its spectral types of F4
  • In this planetary system, the extrasolar planet K2-63 b orbits around the star K2-63 every 20.3 days with its orbital distance of 0.16 AU ( 24339573.6 km)
  • (Projected orbit of K2-63 b around its host star K2-63)


  • The Star K2-63 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.619 AU ( 242187288.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.238 AU ( 334766123.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.410 AU ( 510109488.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.018 AU ( 750648458.9 km)
  • Radiation at Planetary Boundary of K2-63 b : 258711.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-63)



  • Kopparapu Recent Venus for Star K2-63 distance : 1.582 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-63 distance : 2.004 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-63 distance : 1.935 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-63 distance : 2.120 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-63 distance : 3.474 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-63 distance : 3.664 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-63)



  • Original Kopparapu Recent Venus for Star K2-63 distance : 1.619 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-63 distance : 2.053 AU
  • Original Kopparapu Moist Greenhouse for Star K2-63 distance : 2.142 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-63 distance : 3.537 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-63 distance : 3.679 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-63)



    (Position in Stellar Map of star K2-63 and its Exoplanet K2-63 b)



    (Zoomed position in Stellar Map of star K2-63 and its Exoplanet K2-63 b (zoom level 3))

    (Synthetic Spectrum of star K2-63*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102