Imaginary Picture of K2-285 b
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Exoplanet Name : K2-285 b
Alternate Name : EPIC 246471491 b
Radius (Rjup / Re): 0.2311 (Rjup) 2.5904 (Rearth)
Mass (Mjup / Me): 0.0305 (Mjup) 9.6844 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0382 (AU) 0.0382 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0095
Orbital Period(Observed/Estimated) 3.47 (Days Obs.) 2.99 (Days Est.)
Star Radiation at Atmospheric Boundary: 319361.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1061.0 (K)
Blackbody T 0.3(K) 996.4 (K)
Blackbody T 0.7(K) 806.2 (K)
Tidally Locked Blackbody T 0.1(K) 1261.7 (K)
Tidally Locked Blackbody T 0.3(K) 1184.9 (K)
Size Class: sub-Neptune-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 : K2-285
Alternate Name : EPIC 246471491
Star Distance(LY) : 507.5
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4975 (K)
Spectral type : K2V
Metalicity : 0.0
Absolute Magnitude: 6.1
Apparent Magnitude: 12.0
Right Ascension(RA) 349.3843
Declination (DEC) 1.3003
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-285+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-285 b
K2-285 b

  • K2-285 b is an exoplanet orbiting the star K2-285, located about 507.5 light-years (155.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-285 has apparent magnitude of 12.0, with absolute magnitude of 6.1.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4975 with its spectral types of K2V
  • In this planetary system, the extrasolar planet K2-285 b orbits around the star K2-285 every 3.5 days with its orbital distance of 0.04 AU ( 5710150.7 km)
  • (Projected orbit of K2-285 b around its host star K2-285)


  • The Star K2-285 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.422 AU ( 63127561.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.583 AU ( 87258787.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.889 AU ( 132963081.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.308 AU ( 195660999.6 km)
  • Radiation at Planetary Boundary of K2-285 b : 319361.31 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-285)



  • Kopparapu Recent Venus for Star K2-285 distance : 0.457 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-285 distance : 0.579 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-285 distance : 0.559 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-285 distance : 0.613 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-285 distance : 1.050 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-285 distance : 1.107 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-285)



  • Original Kopparapu Recent Venus for Star K2-285 distance : 0.452 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-285 distance : 0.596 AU
  • Original Kopparapu Moist Greenhouse for Star K2-285 distance : 0.598 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-285 distance : 1.067 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-285 distance : 1.110 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-285)



    (Position in Stellar Map of star K2-285 and its Exoplanet K2-285 b)



    (Zoomed position in Stellar Map of star K2-285 and its Exoplanet K2-285 b (zoom level 3))