Imaginary Picture of K2-223 c

Display orbital revolution of K2-223 c around the hoststar K2-223
/
Exoplanet Name : K2-223 c
Alternate Name : "2MASS J12211347-1016552 c, EPIC 228721452 c, EPIC 228721452.02, WISE J122113.48-101655.4 c"
Status : Confirmed
Radius (Rjup / Re): 0.1400 (Rjup) 1.5693 (Rearth)
Mass (Mjup / Me): 0.0126 (Mjup) 4.0115 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0549 (AU) 0.0549 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0125
Orbital Period(Observed/Estimated) 4.56 (Days Obs.) 4.56 (Days Est.)
Surface Gravity (G Earth) 1.6290
Star Radiation at Atmospheric Boundary: 462268.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1163.8 (K)
Blackbody T 0.3(K) 1092.9 (K)
Blackbody T 0.7(K) 884.3 (K)
Tidally Locked Blackbody T 0.1(K) 1384.0 (K)
Tidally Locked Blackbody T 0.3(K) 1299.7 (K)
Size Class: super-Earth-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 : K2-223
Alternate Name : "2MASS J12211347-1016552, EPIC 228721452, WISE J122113.48-101655.4"
Star Distance(LY) : 672.5
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5835 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 3.6
Apparent Magnitude: 10.2
Right Ascension(RA) 185.3062
Declination (DEC) -10.2820
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=K2-223+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-223 c
K2-223 c

  • K2-223 c is an exoplanet orbiting the star K2-223, located about 672.5 light-years (206.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-223 has apparent magnitude of 10.2, with absolute magnitude of 3.6.
  • It is 1.1 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5835 with its spectral types of G2
  • In this planetary system, the extrasolar planet K2-223 c orbits around the star K2-223 every 4.6 days with its orbital distance of 0.05 AU ( 8212923.1 km)
  • (Projected orbit of K2-223 c around its host star K2-223)


  • The Star K2-223 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.730 AU ( 109238323.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.009 AU ( 150995911.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.538 AU ( 230084353.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.263 AU ( 338579204.8 km)
  • Radiation at Planetary Boundary of K2-223 c : 462268.13 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-223)



  • Kopparapu Recent Venus for Star K2-223 distance : 0.754 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-223 distance : 0.955 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-223 distance : 0.922 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-223 distance : 1.011 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-223 distance : 1.684 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-223 distance : 1.776 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-223)



  • Original Kopparapu Recent Venus for Star K2-223 distance : 0.756 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-223 distance : 0.981 AU
  • Original Kopparapu Moist Greenhouse for Star K2-223 distance : 1.000 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-223 distance : 1.714 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-223 distance : 1.782 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-223)



    (Position in Stellar Map of star K2-223 and its Exoplanet K2-223 c)



    (Zoomed position in Stellar Map of star K2-223 and its Exoplanet K2-223 c (zoom level 3))

    (Synthetic Spectrum of star K2-223*)
    *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