Imaginary Picture of K2-65 b

Display orbital revolution of K2-65 b around the hoststar K2-65
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Exoplanet Name : K2-65 b
Alternate Name : EPIC 206144956.01
Status : Confirmed
Radius (Rjup / Re): 0.1410 (Rjup) 1.5805 (Rearth)
Mass (Mjup / Me): 0.0127 (Mjup) 4.0382 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1014 (AU) 0.1014 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0346
Orbital Period(Observed/Estimated) 12.65 (Days Obs.) 12.64 (Days Est.)
Surface Gravity (G Earth) 1.6166
Star Radiation at Atmospheric Boundary: 62149.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 704.7 (K)
Blackbody T 0.3(K) 661.8 (K)
Blackbody T 0.7(K) 535.5 (K)
Tidally Locked Blackbody T 0.1(K) 838.0 (K)
Tidally Locked Blackbody T 0.3(K) 787.0 (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 : K2-65
Alternate Name : "2MASS J22125079-1055311, BD-11 5779, EPIC 206144956, HIP 109656, TYC 5806-00695-1"
Star Distance(LY) : 254.6
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5213 (K)
Spectral type : K0
UV portion[%]: 5.1
Visible portion[%]: 40.3
IR portion[%]: 54.6
Metalicity : 0.0
Absolute Magnitude: 4.5
Apparent Magnitude: 9.0
Right Ascension(RA) 333.2118
Declination (DEC) -10.9254
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
K2-65 b
K2-65 b

  • K2-65 b is an exoplanet orbiting the star K2-65, located about 254.6 light-years (78.1 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-65 has apparent magnitude of 9.0, with absolute magnitude of 4.5.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5213 with its spectral types of K0
  • In this planetary system, the extrasolar planet K2-65 b orbits around the star K2-65 every 12.6 days with its orbital distance of 0.10 AU ( 15169224.1 km)
  • (Projected orbit of K2-65 b around its host star K2-65)


  • The Star K2-65 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.495 AU ( 73979748.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.684 AU ( 102259345.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.042 AU ( 155820612.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.533 AU ( 229296856.7 km)
  • Radiation at Planetary Boundary of K2-65 b : 62149.60 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-65)



  • Kopparapu Recent Venus for Star K2-65 distance : 0.529 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-65 distance : 0.670 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-65 distance : 0.647 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-65 distance : 0.710 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-65 distance : 1.205 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-65 distance : 1.271 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-65)



  • Original Kopparapu Recent Venus for Star K2-65 distance : 0.525 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-65 distance : 0.690 AU
  • Original Kopparapu Moist Greenhouse for Star K2-65 distance : 0.695 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-65 distance : 1.225 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-65 distance : 1.274 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-65)



    (Position in Stellar Map of star K2-65 and its Exoplanet K2-65 b)



    (Zoomed position in Stellar Map of star K2-65 and its Exoplanet K2-65 b (zoom level 3))

    (Synthetic Spectrum of star K2-65*)
    *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