Imaginary Picture of Kepler-186 b
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Exoplanet Name : Kepler-186 b
Alternate Name :
Radius (Rjup / Re): 0.1020 (Rjup) 1.1433 (Rearth)
Mass (Mjup / Me): 0.0050 (Mjup) 1.5835 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0400 (AU) 0.0400 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0106
Orbital Period(Observed/Estimated) 3.89 (Days Obs.) 4.23 (Days Est.)
Star Radiation at Atmospheric Boundary: 35156.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 611.1 (K)
Blackbody T 0.3(K) 573.9 (K)
Blackbody T 0.7(K) 464.4 (K)
Tidally Locked Blackbody T 0.1(K) 726.8 (K)
Tidally Locked Blackbody T 0.3(K) 682.5 (K)
Size Class: 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 : Kepler-186
Alternate Name :
Star Distance(LY) : 492.5
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3788 (K)
Spectral type : M0
Metalicity : -0.3
Absolute Magnitude: 6.6
Apparent Magnitude: 12.5
Right Ascension(RA) 298.6527
Declination (DEC) 43.9550
Hubble Space Telescope Guide Star Catalog (GSC) ID 0
Discovered by
Discovery Paper - Authors "Elisa V. Quintana, Thomas Barclay, Sean N. Raymond, Jason F. Rowe, Emeline Bolmont, Douglas A. Caldwell, Steve B. Howell, Stephen R. Kane, Daniel Huber, Justin R. Crepp, Jack J. Lissauer, David R. Ciardi, Jeffrey L. Coughlin, Mark E. Everett, Christopher E. Henze, Elliott Horch, Howard Isaacson, Eric B. Ford, Fred C. Adams, Martin Still, Roger C. Hunter, Billy Quarles, Franck Selsis"
Discovery Paper - Title An Earth-Sized Planet in the Habitable Zone of a Cool Star
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-186+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-186%20b/
Kepler-186 b
Kepler-186 b

  • Kepler-186 b is an exoplanet orbiting the star Kepler-186, located about 492.5 light-years (151.0 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-186 has apparent magnitude of 12.5, with absolute magnitude of 6.6.
  • It is 0.5 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3788 with its spectral types of M0
  • In this planetary system, the extrasolar planet Kepler-186 b orbits around the star Kepler-186 every 3.9 days with its orbital distance of 0.04 AU ( 5983914.8 km)
  • (Projected orbit of Kepler-186 b around its host star Kepler-186)


  • The Star Kepler-186 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.147 AU ( 21949268.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.203 AU ( 30339625.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.309 AU ( 46230874.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.455 AU ( 68030757.2 km)
  • Radiation at Planetary Boundary of Kepler-186 b : 35156.75 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-186)



  • Kopparapu Recent Venus for Star Kepler-186 distance : 0.165 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-186 distance : 0.209 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-186 distance : 0.202 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-186 distance : 0.222 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-186 distance : 0.401 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-186 distance : 0.423 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-186)



  • Original Kopparapu Recent Venus for Star Kepler-186 distance : 0.163 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-186 distance : 0.216 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-186 distance : 0.216 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-186 distance : 0.407 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-186 distance : 0.423 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-186)



    (Position in Stellar Map of star Kepler-186 and its Exoplanet Kepler-186 b)



    (Zoomed position in Stellar Map of star Kepler-186 and its Exoplanet Kepler-186 b (zoom level 3))