Imaginary Picture of Kepler-186 f

Display orbital revolution of Kepler-186 f around the hoststar Kepler-186
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Exoplanet Name : Kepler-186 f
Alternate Name : "2MASS J19543665+4357180 f, K00571.05, KIC 8120608 f, KOI-571 f, KOI-571.05, WISE J195436.65+435717.9 f"
Status : Confirmed
Radius (Rjup / Re): 0.1040 (Rjup) 1.1657 (Rearth)
Mass (Mjup / Me): 0.0053 (Mjup) 1.6986 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.4320 (AU) 0.4320 (AU Est.)
Eccentricity : 0.0400
Orbital Period(Yrs) 0.3558
Orbital Period(Observed/Estimated) 129.94 (Days Obs.) 141.13 (Days Est.)
Surface Gravity (G Earth) 1.2499
Star Radiation at Atmospheric Boundary: 376.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 196.6 (K)
Blackbody T 0.3(K) 184.7 (K)
Blackbody T 0.7(K) 149.4 (K)
Tidally Locked Blackbody T 0.1(K) 233.8 (K)
Tidally Locked Blackbody T 0.3(K) 219.6 (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: Habitable
Star Name : Kepler-186
Alternate Name : "2MASS J19543665+4357180, KIC 8120608, KOI-571, WISE J195436.65+435717.9"
Star Distance(LY) : 579.1
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 4.0 (GY)
Temperature : 3748 (K)
Spectral type : M1
UV portion[%]: 0.3
Visible portion[%]: 13.4
IR portion[%]: 86.3
Metalicity : -0.3
Absolute Magnitude: 6.2
Apparent Magnitude: 12.5
Right Ascension(RA) 298.6527
Declination (DEC) 43.9550
Hubble Space Telescope Guide Star Catalog (GSC) ID
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%20f/
Kepler-186 f
Kepler-186 f

  • Kepler-186 f is an exoplanet orbiting the star Kepler-186, located about 579.1 light-years (177.6 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 6.2.
  • It is 0.5 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3748 with its spectral types of M1
  • In this planetary system, the extrasolar planet Kepler-186 f orbits around the star Kepler-186 every 129.9 days with its orbital distance of 0.43 AU ( 64626280.1 km)
  • (Projected orbit of Kepler-186 f 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 ) : 0.164 AU ( 24538388.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.227 AU ( 33918465.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.345 AU ( 51684235.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.508 AU ( 76055617.2 km)
  • Radiation at Planetary Boundary of Kepler-186 f : 376.72 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 : 0.185 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-186 distance : 0.234 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-186 distance : 0.226 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-186 distance : 0.248 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-186 distance : 0.449 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-186 distance : 0.474 AU

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



  • Original Kopparapu Recent Venus for Star Kepler-186 distance : 0.183 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-186 distance : 0.242 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-186 distance : 0.242 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-186 distance : 0.456 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-186 distance : 0.475 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 f)



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

    (Synthetic Spectrum of star Kepler-186*)
    *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