Imaginary Picture of K2-50 b

Display orbital revolution of K2-50 b around the hoststar K2-50
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Exoplanet Name : K2-50 b
Alternate Name : "2MASS J11175607+0559183 b, EPIC 201833600 b, EPIC 201833600.01, WISE J111756.07+055917.9 b"
Status : Confirmed
Radius (Rjup / Re): 0.1420 (Rjup) 1.5917 (Rearth)
Mass (Mjup / Me): 0.0128 (Mjup) 4.0648 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0705 (AU) 0.0705 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0240
Orbital Period(Observed/Estimated) 8.75 (Days Obs.) 8.75 (Days Est.)
Surface Gravity (G Earth) 1.6045
Star Radiation at Atmospheric Boundary: 8757.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 431.7 (K)
Blackbody T 0.3(K) 405.5 (K)
Blackbody T 0.7(K) 328.1 (K)
Tidally Locked Blackbody T 0.1(K) 513.4 (K)
Tidally Locked Blackbody T 0.3(K) 482.2 (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 : K2-50
Alternate Name : "2MASS J11175607+0559183, EPIC 201833600, WISE J111756.07+055917.9"
Star Distance(LY) : 836.6
Stellar Radius(Rsun) : 0.5 (Rsun Estimated)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.6
Metalicity : 0.0
Absolute Magnitude: 5.4
Apparent Magnitude: 12.4
Right Ascension(RA) 169.4836
Declination (DEC) 5.9884
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=K2-50+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-50 b
K2-50 b

  • K2-50 b is an exoplanet orbiting the star K2-50, located about 836.6 light-years (256.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-50 has apparent magnitude of 12.4, with absolute magnitude of 5.4.
  • It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • In this planetary system, the extrasolar planet K2-50 b orbits around the star K2-50 every 8.8 days with its orbital distance of 0.07 AU ( 10546649.9 km)
  • (Projected orbit of K2-50 b around its host star K2-50)


  • The Star K2-50 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.129 AU ( 19307372.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.178 AU ( 26687835.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.272 AU ( 40666354.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.400 AU ( 59842322.2 km)
  • Radiation at Planetary Boundary of K2-50 b : 8757.03 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-50)



  • Kopparapu Recent Venus for Star K2-50 distance : 0.146 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-50 distance : 0.185 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-50 distance : 0.179 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-50 distance : 0.197 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-50 distance : 0.363 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-50 distance : 0.383 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-50)



  • Original Kopparapu Recent Venus for Star K2-50 distance : 0.145 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-50 distance : 0.192 AU
  • Original Kopparapu Moist Greenhouse for Star K2-50 distance : 0.192 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-50 distance : 0.369 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-50 distance : 0.384 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-50)



    (Position in Stellar Map of star K2-50 and its Exoplanet K2-50 b)



    (Zoomed position in Stellar Map of star K2-50 and its Exoplanet K2-50 b (zoom level 3))

    (Synthetic Spectrum of star K2-50*)
    *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