Imaginary Picture of K2-213 b

Display orbital revolution of K2-213 b around the hoststar K2-213
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Exoplanet Name : K2-213 b
Alternate Name : "2MASS J00523368+0330277 b, EPIC 220341183 b, EPIC 220341183.01, TYC 15-1059-1 b, WISE J005233.68+033027.9 b"
Status : Confirmed
Radius (Rjup / Re): 0.1350 (Rjup) 1.5132 (Rearth)
Mass (Mjup / Me): 0.0138 (Mjup) 4.3954 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0809 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0223
Orbital Period(Observed/Estimated) 8.13 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.9195
Star Radiation at Atmospheric Boundary: 303782.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1047.8 (K)
Blackbody T 0.3(K) 984.0 (K)
Blackbody T 0.7(K) 796.2 (K)
Tidally Locked Blackbody T 0.1(K) 1246.1 (K)
Tidally Locked Blackbody T 0.3(K) 1170.2 (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 : K2-213
Alternate Name : "2MASS J00523368+0330277, EPIC 220341183, TYC 15-1059-1, WISE J005233.68+033027.9"
Star Distance(LY) : 1301.0
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5794 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.2
Absolute Magnitude: 3.0
Apparent Magnitude: 11.0
Right Ascension(RA) 13.1403
Declination (DEC) 3.5077
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-213&submit=SIMBAD+search
Open Exoplanet Database Link
K2-213 b
K2-213 b

  • K2-213 b is an exoplanet orbiting the star K2-213, located about 1301.0 light-years (398.9 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-213 has apparent magnitude of 11.0, with absolute magnitude of 3.0.
  • It is 1.1 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5794 with its spectral types of G2
  • In this planetary system, the extrasolar planet K2-213 b orbits around the star K2-213 every 8.1 days with its orbital distance of 0.08 AU ( 12108337.9 km)
  • (Projected orbit of K2-213 b around its host star K2-213)


  • The Star K2-213 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.873 AU ( 130555851.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.206 AU ( 180462304.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.838 AU ( 274984615.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.705 AU ( 404651908.6 km)
  • Radiation at Planetary Boundary of K2-213 b : 303782.69 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-213)



  • Kopparapu Recent Venus for Star K2-213 distance : 0.904 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-213 distance : 1.144 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-213 distance : 1.105 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-213 distance : 1.212 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-213 distance : 2.020 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-213 distance : 2.130 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-213)



  • Original Kopparapu Recent Venus for Star K2-213 distance : 0.905 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-213 distance : 1.176 AU
  • Original Kopparapu Moist Greenhouse for Star K2-213 distance : 1.198 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-213 distance : 2.055 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-213 distance : 2.138 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-213)



    (Position in Stellar Map of star K2-213 and its Exoplanet K2-213 b)



    (Zoomed position in Stellar Map of star K2-213 and its Exoplanet K2-213 b (zoom level 3))

    (Synthetic Spectrum of star K2-213*)
    *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