Imaginary Picture of K2-158 c

Display orbital revolution of K2-158 c around the hoststar K2-158
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Exoplanet Name : K2-158 c
Alternate Name : "2MASS J11594560-0543182 c, EPIC 201132684 c, EPIC 201132684.02, TYC 4938-997-1 c, WISE J115945.55-054318.1 c"
Status : Confirmed
Radius (Rjup / Re): 0.1140 (Rjup) 1.2778 (Rearth)
Mass (Mjup / Me): 0.0075 (Mjup) 2.3693 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0622 (AU) 0.0622 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0162
Orbital Period(Observed/Estimated) 5.90 (Days Obs.) 5.91 (Days Est.)
Surface Gravity (G Earth) 1.4510
Star Radiation at Atmospheric Boundary: 262342.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1010.1 (K)
Blackbody T 0.3(K) 948.6 (K)
Blackbody T 0.7(K) 767.5 (K)
Tidally Locked Blackbody T 0.1(K) 1201.2 (K)
Tidally Locked Blackbody T 0.3(K) 1128.1 (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 : K2-158
Alternate Name : "2MASS J11594560-0543182, EPIC 201132684, TYC 4938-997-1, WISE J115945.55-054318.1"
Star Distance(LY) : 646.4
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5503 (K)
Spectral type : G7
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.1
Absolute Magnitude: 3.9
Apparent Magnitude: 10.4
Right Ascension(RA) 179.9400
Declination (DEC) -5.7217
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
K2-158 c
K2-158 c

  • K2-158 c is an exoplanet orbiting the star K2-158, located about 646.4 light-years (198.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-158 has apparent magnitude of 10.4, with absolute magnitude of 3.9.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5503 with its spectral types of G7
  • In this planetary system, the extrasolar planet K2-158 c orbits around the star K2-158 every 5.9 days with its orbital distance of 0.06 AU ( 9304987.6 km)
  • (Projected orbit of K2-158 c around its host star K2-158)


  • The Star K2-158 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.623 AU ( 93235379.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.861 AU ( 128875659.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.313 AU ( 196377985.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.932 AU ( 288978808.6 km)
  • Radiation at Planetary Boundary of K2-158 c : 262342.89 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-158)



  • Kopparapu Recent Venus for Star K2-158 distance : 0.656 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-158 distance : 0.831 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-158 distance : 0.803 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-158 distance : 0.881 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-158 distance : 1.480 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-158 distance : 1.561 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-158)



  • Original Kopparapu Recent Venus for Star K2-158 distance : 0.654 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-158 distance : 0.855 AU
  • Original Kopparapu Moist Greenhouse for Star K2-158 distance : 0.865 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-158 distance : 1.505 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-158 distance : 1.566 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-158)



    (Position in Stellar Map of star K2-158 and its Exoplanet K2-158 c)



    (Zoomed position in Stellar Map of star K2-158 and its Exoplanet K2-158 c (zoom level 3))

    (Synthetic Spectrum of star K2-158*)
    *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