Imaginary Picture of K2-396 c

Display orbital revolution of K2-396 c around the hoststar K2-396
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Exoplanet Name : K2-396 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2787 (Rjup) 3.1241 (Rearth)
Mass (Mjup / Me): 0.0315 (Mjup) 10.0150 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1681 (AU) 0.1681 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0705
Orbital Period(Observed/Estimated) 25.76 (Days Obs.) 25.77 (Days Est.)
Surface Gravity (G Earth) 1.0262
Star Radiation at Atmospheric Boundary: 27608.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 575.3 (K)
Blackbody T 0.3(K) 540.3 (K)
Blackbody T 0.7(K) 437.1 (K)
Tidally Locked Blackbody T 0.1(K) 684.2 (K)
Tidally Locked Blackbody T 0.3(K) 642.5 (K)
Size Class: 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 : K2-396
Alternate Name : EPIC 246953392
Star Distance(LY) : 896.5
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5236 (K)
Spectral type : G8V
UV portion[%]: 5.3
Visible portion[%]: 40.6
IR portion[%]: 54.0
Metalicity : 0.2
Absolute Magnitude: 6.0
Apparent Magnitude: 13.2
Right Ascension(RA) 74.6928
Declination (DEC) 17.2692
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
K2-396 c
K2-396 c

  • K2-396 c is an exoplanet orbiting the star K2-396, located about 896.5 light-years (274.9 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star K2-396 has apparent magnitude of 13.2, with absolute magnitude of 6.0.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5236 with its spectral types of G8V
  • In this planetary system, the extrasolar planet K2-396 c orbits around the star K2-396 every 25.8 days with its orbital distance of 0.17 AU ( 25147402.1 km)
  • (Projected orbit of K2-396 c around its host star K2-396)


  • The Star K2-396 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.546 AU ( 81741991.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.755 AU ( 112988794.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.151 AU ( 172169918.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.694 AU ( 253355576.9 km)
  • Radiation at Planetary Boundary of K2-396 c : 27608.55 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-396)



  • Kopparapu Recent Venus for Star K2-396 distance : 0.584 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-396 distance : 0.740 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-396 distance : 0.714 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-396 distance : 0.784 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-396 distance : 1.328 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-396 distance : 1.401 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-396)



  • Original Kopparapu Recent Venus for Star K2-396 distance : 0.580 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-396 distance : 0.761 AU
  • Original Kopparapu Moist Greenhouse for Star K2-396 distance : 0.767 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-396 distance : 1.351 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-396 distance : 1.405 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-396)



    (Position in Stellar Map of star K2-396 and its Exoplanet K2-396 c)



    (Zoomed position in Stellar Map of star K2-396 and its Exoplanet K2-396 c (zoom level 3))

    (Synthetic Spectrum of star K2-396*)
    *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