Imaginary Picture of K2-343 b

Display orbital revolution of K2-343 b around the hoststar K2-343
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Exoplanet Name : K2-343 b
Alternate Name : "EPIC 212072539 b, EPIC 212072539.02"
Status : Confirmed
Radius (Rjup / Re): 0.1472 (Rjup) 1.6500 (Rearth)
Mass (Mjup / Me): 0.0132 (Mjup) 4.2031 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0306 (AU) 0.0306 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0076
Orbital Period(Observed/Estimated) 2.79 (Days Obs.) 2.79 (Days Est.)
Surface Gravity (G Earth) 1.5439
Star Radiation at Atmospheric Boundary: 58142.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 693.1 (K)
Blackbody T 0.3(K) 650.8 (K)
Blackbody T 0.7(K) 526.6 (K)
Tidally Locked Blackbody T 0.1(K) 824.2 (K)
Tidally Locked Blackbody T 0.3(K) 774.0 (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 : K2-343
Alternate Name : EPIC 212072539
Star Distance(LY) : 542.0
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3804 (K)
Spectral type : M2V
UV portion[%]: 0.3
Visible portion[%]: 13.8
IR portion[%]: 85.9
Metalicity : -0.1
Absolute Magnitude: 9.9
Apparent Magnitude: 16.0
Right Ascension(RA) 134.2022
Declination (DEC) 21.5027
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
K2-343 b
K2-343 b

  • K2-343 b is an exoplanet orbiting the star K2-343, located about 542.0 light-years (166.2 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-343 has apparent magnitude of 16.0, with absolute magnitude of 9.9.
  • It is 0.5 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3804 with its spectral types of M2V
  • In this planetary system, the extrasolar planet K2-343 b orbits around the star K2-343 every 2.8 days with its orbital distance of 0.03 AU ( 4573206.9 km)
  • (Projected orbit of K2-343 b around its host star K2-343)


  • The Star K2-343 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.144 AU ( 21572325.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.199 AU ( 29818591.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.304 AU ( 45436934.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.447 AU ( 66862438.8 km)
  • Radiation at Planetary Boundary of K2-343 b : 58142.22 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-343)



  • Kopparapu Recent Venus for Star K2-343 distance : 0.162 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-343 distance : 0.205 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-343 distance : 0.198 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-343 distance : 0.218 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-343 distance : 0.393 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-343 distance : 0.415 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-343)



  • Original Kopparapu Recent Venus for Star K2-343 distance : 0.160 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-343 distance : 0.212 AU
  • Original Kopparapu Moist Greenhouse for Star K2-343 distance : 0.212 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-343 distance : 0.400 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-343 distance : 0.416 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-343)



    (Position in Stellar Map of star K2-343 and its Exoplanet K2-343 b)



    (Zoomed position in Stellar Map of star K2-343 and its Exoplanet K2-343 b (zoom level 3))

    (Synthetic Spectrum of star K2-343*)
    *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