Imaginary Picture of K2-43 b
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Exoplanet Name : K2-43 b
Alternate Name :
Radius (Rjup / Re): 0.4024 (Rjup) 4.5105 (Rearth)
Mass (Mjup / Me): 0.0639 (Mjup) 20.3070 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0201 (AU) 0.0201 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0095
Orbital Period(Observed/Estimated) 3.47 (Days Obs.) 1.38 (Days Est.)
Star Radiation at Atmospheric Boundary: 193881.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 936.5 (K)
Blackbody T 0.3(K) 879.5 (K)
Blackbody T 0.7(K) 711.6 (K)
Tidally Locked Blackbody T 0.1(K) 1113.7 (K)
Tidally Locked Blackbody T 0.3(K) 1045.9 (K)
Size Class: Neptune-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 : K2-43
Alternate Name : EPIC 201205469
Star Distance(LY) : 598.4
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3840 (K)
Spectral type : K7 V
Metalicity : 0.0
Absolute Magnitude: 9.3
Apparent Magnitude: 15.6
Right Ascension(RA) 169.1172
Declination (DEC) -3.9754
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=K2-43+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-43 b
K2-43 b

  • K2-43 b is an exoplanet orbiting the star K2-43, located about 598.4 light-years (183.5 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star K2-43 has apparent magnitude of 15.6, with absolute magnitude of 9.3.
  • It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3840 with its spectral types of K7 V
  • In this planetary system, the extrasolar planet K2-43 b orbits around the star K2-43 every 3.5 days with its orbital distance of 0.02 AU ( 3006917.2 km)
  • (Projected orbit of K2-43 b around its host star K2-43)


  • The Star K2-43 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.173 AU ( 25901197.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.239 AU ( 35802224.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.365 AU ( 54554666.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.537 AU ( 80279581.6 km)
  • Radiation at Planetary Boundary of K2-43 b : 193881.41 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-43)



  • Kopparapu Recent Venus for Star K2-43 distance : 0.195 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-43 distance : 0.246 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-43 distance : 0.238 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-43 distance : 0.262 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-43 distance : 0.471 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-43 distance : 0.497 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-43)



  • Original Kopparapu Recent Venus for Star K2-43 distance : 0.192 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-43 distance : 0.255 AU
  • Original Kopparapu Moist Greenhouse for Star K2-43 distance : 0.255 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-43 distance : 0.479 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-43 distance : 0.498 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-43)



    (Position in Stellar Map of star K2-43 and its Exoplanet K2-43 b)



    (Zoomed position in Stellar Map of star K2-43 and its Exoplanet K2-43 b (zoom level 3))