Imaginary Picture of K2-111 c

Display orbital revolution of K2-111 c around the hoststar K2-111
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Exoplanet Name : K2-111 c
Alternate Name : "EPIC 210894022 c, 2MASS J03593351+2117552 c, TIC 14227229 c
Radius (Rjup / Re): 0.2022 (Rjup) 2.2662 (Rearth)
Mass (Mjup / Me): 0.0355 (Mjup) 11.3027 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1166 (AU) 0.1166 (AU Est.)
Eccentricity : 0.0700
Orbital Period(Yrs) 0.0429
Orbital Period(Observed/Estimated) 15.68 (Days Obs.) 15.87 (Days Est.)
Surface Gravity (G Earth) 2.2008
Star Radiation at Atmospheric Boundary: 156760.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 888.1 (K)
Blackbody T 0.3(K) 834.0 (K)
Blackbody T 0.7(K) 674.8 (K)
Tidally Locked Blackbody T 0.1(K) 1056.1 (K)
Tidally Locked Blackbody T 0.3(K) 991.8 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-111
Alternate Name : "2MASS 03593351 + 211755, Cl* Melotte 25 PELS 9, K2-111, 2MASS J-St^FžvL5@ftnP@
Star Distance(LY) : 657.2
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 12.3 (GY)
Temperature : 5775 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.4
Metalicity : -0.5
Absolute Magnitude: 4.6
Apparent Magnitude: 11.1
Right Ascension(RA) 59.8897
Declination (DEC) 21.2987
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=K2-111+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-111 c
K2-111 c

  • K2-111 c is an exoplanet orbiting the star K2-111, located about 657.2 light-years (201.5 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star K2-111 has apparent magnitude of 11.1, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5775 with its spectral types of G2
  • In this planetary system, the extrasolar planet K2-111 c orbits around the star K2-111 every 15.7 days with its orbital distance of 0.12 AU ( 17443111.7 km)
  • (Projected orbit of K2-111 c around its host star K2-111)


  • The Star K2-111 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.903 AU ( 135105211.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.248 AU ( 186750709.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.902 AU ( 284566754.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.799 AU ( 418752444.7 km)
  • Radiation at Planetary Boundary of K2-111 c : 156760.16 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-111)



  • Kopparapu Recent Venus for Star K2-111 distance : 0.936 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-111 distance : 1.186 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-111 distance : 1.145 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-111 distance : 1.255 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-111 distance : 2.094 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-111 distance : 2.208 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-111)



  • Original Kopparapu Recent Venus for Star K2-111 distance : 0.937 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-111 distance : 1.218 AU
  • Original Kopparapu Moist Greenhouse for Star K2-111 distance : 1.240 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-111 distance : 2.131 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-111 distance : 2.216 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-111)



    (Position in Stellar Map of star K2-111 and its Exoplanet K2-111 c)



    (Zoomed position in Stellar Map of star K2-111 and its Exoplanet K2-111 c (zoom level 3))

    (Synthetic Spectrum of star K2-111*)
    *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