Imaginary Picture of K2-265 Ab

Display orbital revolution of K2-265 Ab around the hoststar K2-265 A
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Exoplanet Name : K2-265 Ab
Alternate Name : "2MASS J22480755-1429407 b, EPIC 206011496 b, EPIC 206011496.01, TYC 5818-486-1 b, WISE J224807.58-142941.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.1530 (Rjup) 1.7150 (Rearth)
Mass (Mjup / Me): 0.0206 (Mjup) 6.5432 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0338 (AU) 0.0338 (AU Est.)
Eccentricity : 0.0840
Orbital Period(Yrs) 0.0065
Orbital Period(Observed/Estimated) 2.37 (Days Obs.) 2.36 (Days Est.)
Surface Gravity (G Earth) 2.2247
Star Radiation at Atmospheric Boundary: 929871.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1386.0 (K)
Blackbody T 0.3(K) 1301.6 (K)
Blackbody T 0.7(K) 1053.1 (K)
Tidally Locked Blackbody T 0.1(K) 1648.2 (K)
Tidally Locked Blackbody T 0.3(K) 1547.8 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-265 A
Alternate Name : "2MASS J22480755-1429407, EPIC 206011496, TYC 5818-486-1, WISE J224807.58-142941.1"
Star Distance(LY) : 454.1
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 9.7 (GY)
Temperature : 5477 (K)
Spectral type : G8 V
UV portion[%]: 6.8
Visible portion[%]: 43.0
IR portion[%]: 50.2
Metalicity : 0.1
Absolute Magnitude: 5.4
Apparent Magnitude: 11.1
Right Ascension(RA) 342.0315
Declination (DEC) -14.4947
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
K2-265 Ab
K2-265 Ab

  • K2-265 Ab is an exoplanet orbiting the star K2-265 A, located about 454.1 light-years (139.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-265 A has apparent magnitude of 11.1, with absolute magnitude of 5.4.
  • It is 0.9 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5477 with its spectral types of G8 V
  • In this planetary system, the extrasolar planet K2-265 Ab orbits around the star K2-265 A every 2.4 days with its orbital distance of 0.03 AU ( 5050424.1 km)
  • (Projected orbit of K2-265 Ab around its host star K2-265 A)


  • The Star K2-265 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.637 AU ( 95272962.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.880 AU ( 131692132.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.341 AU ( 200669665.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.974 AU ( 295294204.1 km)
  • Radiation at Planetary Boundary of K2-265 Ab : 929871.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-265 A)



  • Kopparapu Recent Venus for Star K2-265 A distance : 0.672 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-265 A distance : 0.851 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-265 A distance : 0.822 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-265 A distance : 0.901 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-265 A distance : 1.516 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-265 A distance : 1.599 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-265 A)



  • Original Kopparapu Recent Venus for Star K2-265 A distance : 0.669 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-265 A distance : 0.875 AU
  • Original Kopparapu Moist Greenhouse for Star K2-265 A distance : 0.885 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-265 A distance : 1.542 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-265 A distance : 1.603 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-265 A)



    (Position in Stellar Map of star K2-265 A and its Exoplanet K2-265 Ab)



    (Zoomed position in Stellar Map of star K2-265 A and its Exoplanet K2-265 Ab (zoom level 3))

    (Synthetic Spectrum of star K2-265 A*)
    *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