Imaginary Picture of K2-365 b

Display orbital revolution of K2-365 b around the hoststar K2-365
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Exoplanet Name : K2-365 b
Alternate Name : "EPIC 204750116 b, EPIC 204750116.01"
Status : Confirmed
Radius (Rjup / Re): 0.2593 (Rjup) 2.9060 (Rearth)
Mass (Mjup / Me): 0.0272 (Mjup) 8.6543 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1503 (AU) 0.1503 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0642
Orbital Period(Observed/Estimated) 23.45 (Days Obs.) 21.48 (Days Est.)
Surface Gravity (G Earth) 1.0248
Star Radiation at Atmospheric Boundary: 58295.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 693.5 (K)
Blackbody T 0.3(K) 651.3 (K)
Blackbody T 0.7(K) 527.0 (K)
Tidally Locked Blackbody T 0.1(K) 824.7 (K)
Tidally Locked Blackbody T 0.3(K) 774.5 (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 : K2-365
Alternate Name : "EPIC 204750116, TYC 6199-1529-1"
Star Distance(LY) : 610.6
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5568 (K)
Spectral type : G5V
UV portion[%]: 7.2
Visible portion[%]: 43.7
IR portion[%]: 49.2
Metalicity : -0.0
Absolute Magnitude: 5.0
Apparent Magnitude: 11.4
Right Ascension(RA) 238.8197
Declination (DEC) -21.0269
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
K2-365 b
K2-365 b

  • K2-365 b is an exoplanet orbiting the star K2-365, located about 610.6 light-years (187.2 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star K2-365 has apparent magnitude of 11.4, with absolute magnitude of 5.0.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5568 with its spectral types of G5V
  • In this planetary system, the extrasolar planet K2-365 b orbits around the star K2-365 every 23.4 days with its orbital distance of 0.15 AU ( 22484560.0 km)
  • (Projected orbit of K2-365 b around its host star K2-365)


  • The Star K2-365 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.710 AU ( 106201720.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.981 AU ( 146798531.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.495 AU ( 223688475.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.200 AU ( 329167391.4 km)
  • Radiation at Planetary Boundary of K2-365 b : 58295.33 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-365)



  • Kopparapu Recent Venus for Star K2-365 distance : 0.745 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-365 distance : 0.943 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-365 distance : 0.911 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-365 distance : 0.999 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-365 distance : 1.676 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-365 distance : 1.768 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-365)



  • Original Kopparapu Recent Venus for Star K2-365 distance : 0.743 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-365 distance : 0.970 AU
  • Original Kopparapu Moist Greenhouse for Star K2-365 distance : 0.983 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-365 distance : 1.705 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-365 distance : 1.773 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-365)



    (Position in Stellar Map of star K2-365 and its Exoplanet K2-365 b)



    (Zoomed position in Stellar Map of star K2-365 and its Exoplanet K2-365 b (zoom level 3))

    (Synthetic Spectrum of star K2-365*)
    *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