Imaginary Picture of EPIC 211391664 b
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Exoplanet Name : EPIC 211391664 b
Alternate Name : "UCAC 508-047859 b, 2MASS 08255719+1130402 b"
Radius (Rjup / Re): 0.3800 (Rjup) 4.2594 (Rearth)
Mass (Mjup / Me): 0.1010 (Mjup) 32.1117 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0943 (AU) 0.0943 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0278
Orbital Period(Observed/Estimated) 10.14 (Days Obs.) 10.21 (Days Est.)
Star Radiation at Atmospheric Boundary: 332500.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1071.7 (K)
Blackbody T 0.3(K) 1006.5 (K)
Blackbody T 0.7(K) 814.3 (K)
Tidally Locked Blackbody T 0.1(K) 1274.5 (K)
Tidally Locked Blackbody T 0.3(K) 1196.9 (K)
Size Class: 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 : EPIC 2011391664
Alternate Name : 2MASS 08255719+1130402
Star Distance(LY) : 1418.8
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 5.2 (GY)
Temperature : 6120 (K)
Spectral type : F8V
Metalicity : -0.2
Absolute Magnitude: 4.0
Apparent Magnitude: 12.2
Right Ascension(RA) 126.4883
Declination (DEC) 11.5111
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=EPIC+211391664+&submit=SIMBAD+search
Open Exoplanet Database Link
EPIC 211391664 b
EPIC 211391664 b

  • EPIC 211391664 b is an exoplanet orbiting the star EPIC 2011391664, located about 1418.8 light-years (435.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star EPIC 2011391664 has apparent magnitude of 12.2, with absolute magnitude of 4.0.
  • It is 1.1 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6120 with its spectral types of F8V
  • In this planetary system, the extrasolar planet EPIC 211391664 b orbits around the star EPIC 2011391664 every 10.1 days with its orbital distance of 0.09 AU ( 14107079.2 km)
  • (Projected orbit of EPIC 211391664 b around its host star EPIC 2011391664)


  • The Star EPIC 2011391664 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.064 AU ( 159134245.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.470 AU ( 219965113.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.241 AU ( 335178154.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.297 AU ( 493229338.2 km)
  • Radiation at Planetary Boundary of EPIC 211391664 b : 332500.65 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 2011391664)



  • Kopparapu Recent Venus for Star EPIC 2011391664 distance : 1.080 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 2011391664 distance : 1.368 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 2011391664 distance : 1.321 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 2011391664 distance : 1.447 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 2011391664 distance : 2.395 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 2011391664 distance : 2.526 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 2011391664)



  • Original Kopparapu Recent Venus for Star EPIC 2011391664 distance : 1.089 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 2011391664 distance : 1.404 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 2011391664 distance : 1.441 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 2011391664 distance : 2.438 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 2011391664 distance : 2.535 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 2011391664)



    (Position in Stellar Map of star EPIC 2011391664 and its Exoplanet EPIC 211391664 b)



    (Zoomed position in Stellar Map of star EPIC 2011391664 and its Exoplanet EPIC 211391664 b (zoom level 3))