Imaginary Picture of EPIC 205950854 c

Display orbital revolution of EPIC 205950854 c around the hoststar K2-168
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Exoplanet Name : EPIC 205950854 c
Alternate Name : "2MASS J22122638-1620301 c, EPIC 205950854.02, K2-168 c, WISE J221226.40-162030.6 c"
Status : Confirmed
Radius (Rjup / Re): 0.1170 (Rjup) 1.3115 (Rearth)
Mass (Mjup / Me): 0.0082 (Mjup) 2.6041 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0623 (AU) 0.0623 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0220
Orbital Period(Observed/Estimated) 8.05 (Days Obs.) 6.06 (Days Est.)
Surface Gravity (G Earth) 1.5141
Star Radiation at Atmospheric Boundary: 199401.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 943.1 (K)
Blackbody T 0.3(K) 885.7 (K)
Blackbody T 0.7(K) 716.6 (K)
Tidally Locked Blackbody T 0.1(K) 1121.6 (K)
Tidally Locked Blackbody T 0.3(K) 1053.3 (K)
Size Class: super-Earth-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 : K2-168
Alternate Name : "EPIC 205950854, 2MASS J22122638-1620301, WISE J221226.40-162030.6"
Star Distance(LY) : 800.9
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5502 (K)
Spectral type : G7
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.0
Absolute Magnitude: 5.2
Apparent Magnitude: 12.2
Right Ascension(RA) 333.1099
Declination (DEC) -16.3418
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=K2-168+&submit=SIMBAD+search
Open Exoplanet Database Link
EPIC 205950854 c
EPIC 205950854 c

  • EPIC 205950854 c is an exoplanet orbiting the star K2-168, located about 800.9 light-years (245.6 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-168 has apparent magnitude of 12.2, with absolute magnitude of 5.2.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5502 with its spectral types of G7
  • In this planetary system, the extrasolar planet EPIC 205950854 c orbits around the star K2-168 every 8.1 days with its orbital distance of 0.06 AU ( 9321443.3 km)
  • (Projected orbit of EPIC 205950854 c around its host star K2-168)


  • The Star K2-168 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.544 AU ( 81428676.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.752 AU ( 112555711.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.146 AU ( 171509995.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.687 AU ( 252384471.1 km)
  • Radiation at Planetary Boundary of EPIC 205950854 c : 199401.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-168)



  • Kopparapu Recent Venus for Star K2-168 distance : 0.573 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-168 distance : 0.726 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-168 distance : 0.701 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-168 distance : 0.769 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-168 distance : 1.293 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-168 distance : 1.363 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-168)



  • Original Kopparapu Recent Venus for Star K2-168 distance : 0.571 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-168 distance : 0.747 AU
  • Original Kopparapu Moist Greenhouse for Star K2-168 distance : 0.756 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-168 distance : 1.315 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-168 distance : 1.367 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-168)



    (Position in Stellar Map of star K2-168 and its Exoplanet EPIC 205950854 c)



    (Zoomed position in Stellar Map of star K2-168 and its Exoplanet EPIC 205950854 c (zoom level 3))

    (Synthetic Spectrum of star K2-168*)
    *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