Imaginary Picture of K2-124 b
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Exoplanet Name : K2-124 b
Alternate Name : EPIC 212154564 b
Radius (Rjup / Re): 0.2355 (Rjup) 2.6397 (Rearth)
Mass (Mjup / Me): 0.0330 (Mjup) 10.4920 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0490 (AU) 0.0490 (AU Est.)
Eccentricity : 0.0800
Orbital Period(Yrs) 0.0176
Orbital Period(Observed/Estimated) 6.41 (Days Obs.) 6.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 9718.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 443.1 (K)
Blackbody T 0.3(K) 416.2 (K)
Blackbody T 0.7(K) 336.7 (K)
Tidally Locked Blackbody T 0.1(K) 527.0 (K)
Tidally Locked Blackbody T 0.3(K) 494.9 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-124
Alternate Name : EPIC 212154564
Star Distance(LY) : 459.7
Stellar Radius(Rsun) : 0.3 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3561 (K)
Spectral type : M3V
Metalicity : 0.0
Absolute Magnitude: 16.3
Apparent Magnitude: 22.0
Right Ascension(RA) 133.6412
Declination (DEC) 23.1328
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=K2-124&submit=SIMBAD+search
Open Exoplanet Database Link
K2-124 b
K2-124 b

  • K2-124 b is an exoplanet orbiting the star K2-124, located about 459.7 light-years (140.9 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-124 has apparent magnitude of 22.0, with absolute magnitude of 16.3.
  • It is 0.4 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3561 with its spectral types of M3V
  • In this planetary system, the extrasolar planet K2-124 b orbits around the star K2-124 every 6.4 days with its orbital distance of 0.05 AU ( 7330295.7 km)
  • (Projected orbit of K2-124 b around its host star K2-124)


  • The Star K2-124 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.095 AU ( 14137105.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.131 AU ( 19541174.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.199 AU ( 29776425.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.293 AU ( 43817314.3 km)
  • Radiation at Planetary Boundary of K2-124 b : 9718.91 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-124)



  • Kopparapu Recent Venus for Star K2-124 distance : 0.107 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-124 distance : 0.135 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-124 distance : 0.130 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-124 distance : 0.143 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-124 distance : 0.262 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-124 distance : 0.276 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-124)



  • Original Kopparapu Recent Venus for Star K2-124 distance : 0.106 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-124 distance : 0.140 AU
  • Original Kopparapu Moist Greenhouse for Star K2-124 distance : 0.140 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-124 distance : 0.266 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-124 distance : 0.277 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-124)



    (Position in Stellar Map of star K2-124 and its Exoplanet K2-124 b)



    (Zoomed position in Stellar Map of star K2-124 and its Exoplanet K2-124 b (zoom level 3))