Imaginary Picture of Kepler-1686 b

Display orbital revolution of Kepler-1686 b around the hoststar Kepler-1686
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Exoplanet Name : Kepler-1686 b
Alternate Name : "2MASS J19262561+4202093 b, K02559.01, KIC 6605493 b, KOI-2559 b, KOI-2559.01, WISE J192625.60+420209.6 b"
Status : Confirmed
Radius (Rjup / Re): 0.1270 (Rjup) 1.4235 (Rearth)
Mass (Mjup / Me): 0.0111 (Mjup) 3.5132 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0866 (AU) 0.0866 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0255
Orbital Period(Observed/Estimated) 9.31 (Days Obs.) 9.33 (Days Est.)
Surface Gravity (G Earth) 1.7337
Star Radiation at Atmospheric Boundary: 236203.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 983.9 (K)
Blackbody T 0.3(K) 924.0 (K)
Blackbody T 0.7(K) 747.6 (K)
Tidally Locked Blackbody T 0.1(K) 1170.1 (K)
Tidally Locked Blackbody T 0.3(K) 1098.8 (K)
Size Class: super-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-1686
Alternate Name : "6605493, 2MASS J19262561+4202093, KIC 6605493, KOI-2559, WISE J192625.60+420209.6"
Star Distance(LY) : 2431.5
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5774 (K)
Spectral type : G3
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 4.3
Apparent Magnitude: 13.6
Right Ascension(RA) 291.6067
Declination (DEC) 42.0359
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=Kepler-1686+&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-1686 b
Kepler-1686 b

  • Kepler-1686 b is an exoplanet orbiting the star Kepler-1686, located about 2431.5 light-years (745.5 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star Kepler-1686 has apparent magnitude of 13.6, with absolute magnitude of 4.3.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5774 with its spectral types of G3
  • In this planetary system, the extrasolar planet Kepler-1686 b orbits around the star Kepler-1686 every 9.3 days with its orbital distance of 0.09 AU ( 12955175.6 km)
  • (Projected orbit of Kepler-1686 b around its host star Kepler-1686)


  • The Star Kepler-1686 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.823 AU ( 123173284.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.138 AU ( 170257668.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.734 AU ( 259435008.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.552 AU ( 381769980.5 km)
  • Radiation at Planetary Boundary of Kepler-1686 b : 236203.24 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1686)



  • Kopparapu Recent Venus for Star Kepler-1686 distance : 0.854 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1686 distance : 1.081 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1686 distance : 1.044 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1686 distance : 1.145 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1686 distance : 1.909 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1686 distance : 2.014 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1686)



  • Original Kopparapu Recent Venus for Star Kepler-1686 distance : 0.855 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1686 distance : 1.111 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1686 distance : 1.131 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1686 distance : 1.943 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1686 distance : 2.020 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1686)



    (Position in Stellar Map of star Kepler-1686 and its Exoplanet Kepler-1686 b)



    (Zoomed position in Stellar Map of star Kepler-1686 and its Exoplanet Kepler-1686 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1686*)
    *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