Imaginary Picture of K2-268 e

Display orbital revolution of K2-268 e around the hoststar K2-268
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Exoplanet Name : K2-268 e
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.1187 (Rjup) 1.3305 (Rearth)
Mass (Mjup / Me): 0.0086 (Mjup) 2.7447 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0619 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0168
Orbital Period(Observed/Estimated) 6.13 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5504
Star Radiation at Atmospheric Boundary: 128630.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 845.2 (K)
Blackbody T 0.3(K) 793.8 (K)
Blackbody T 0.7(K) 642.2 (K)
Tidally Locked Blackbody T 0.1(K) 1005.2 (K)
Tidally Locked Blackbody T 0.3(K) 944.0 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-268
Alternate Name : "2MASS J08545028+1150537, EPIC 211413752, WISE J085450.28+115053.7"
Star Distance(LY) : 1081.1
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5068 (K)
Spectral type : K1
UV portion[%]: 3.7
Visible portion[%]: 37.9
IR portion[%]: 58.4
Metalicity : 0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 12.2
Right Ascension(RA) 133.7095
Declination (DEC) 11.8483
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-268&submit=SIMBAD+search
Open Exoplanet Database Link
K2-268 e
K2-268 e

  • K2-268 e is an exoplanet orbiting the star K2-268, located about 1081.1 light-years (331.5 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star K2-268 has apparent magnitude of 12.2, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5068 with its spectral types of K1
  • In this planetary system, the extrasolar planet K2-268 e orbits around the star K2-268 every 6.1 days with its orbital distance of 0.06 AU ( 9253883.8 km)
  • (Projected orbit of K2-268 e around its host star K2-268)


  • The Star K2-268 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.434 AU ( 64927088.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.600 AU ( 89746203.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.914 AU ( 136753353.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.345 AU ( 201238550.5 km)
  • Radiation at Planetary Boundary of K2-268 e : 128630.27 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-268)



  • Kopparapu Recent Venus for Star K2-268 distance : 0.468 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-268 distance : 0.592 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-268 distance : 0.572 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-268 distance : 0.628 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-268 distance : 1.071 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-268 distance : 1.130 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-268)



  • Original Kopparapu Recent Venus for Star K2-268 distance : 0.463 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-268 distance : 0.610 AU
  • Original Kopparapu Moist Greenhouse for Star K2-268 distance : 0.613 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-268 distance : 1.089 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-268 distance : 1.133 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-268)



    (Position in Stellar Map of star K2-268 and its Exoplanet K2-268 e)



    (Zoomed position in Stellar Map of star K2-268 and its Exoplanet K2-268 e (zoom level 3))

    (Synthetic Spectrum of star K2-268*)
    *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