Imaginary Picture of KOI-3680 b

Display orbital revolution of KOI-3680 b around the hoststar KOI-3680
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Exoplanet Name : KOI-3680 b
Alternate Name : "K03680.01, 2MASS J19330757+4518348 b, KIC 9025971 b, KOI-3680.01, Kepler-1657 b, WISE J193307.57+451834.8 b"
Radius (Rjup / Re): 0.9900 (Rjup) 11.0969 (Rearth)
Mass (Mjup / Me): 1.9300 (Mjup) 613.6203 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.5340 (AU) 0.5340 (AU Est.)
Eccentricity : 0.4960
Orbital Period(Yrs) 0.3867
Orbital Period(Observed/Estimated) 141.24 (Days Obs.) 141.82 (Days Est.)
Surface Gravity (G Earth) 4.9831
Star Radiation at Atmospheric Boundary: 4578.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 367.1 (K)
Blackbody T 0.3(K) 344.8 (K)
Blackbody T 0.7(K) 279.0 (K)
Tidally Locked Blackbody T 0.1(K) 436.6 (K)
Tidally Locked Blackbody T 0.3(K) 410.0 (K)
Size Class: Jupiter-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 : KOI-3680
Alternate Name : "KOI-3680, 2MASS J19330757+4518348, KIC 9025971, Kepler-1657, WISE J193307.57+451834.8"
Star Distance(LY) : 3087.4
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 3.2 (GY)
Temperature : 5830 (K)
Spectral type : G2
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.2
Absolute Magnitude: 4.4
Apparent Magnitude: 14.3
Right Ascension(RA) 293.2816
Declination (DEC) 45.3097
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-1657+&submit=SIMBAD+search
Open Exoplanet Database Link
KOI-3680 b
KOI-3680 b

  • KOI-3680 b is an exoplanet orbiting the star KOI-3680, located about 3087.4 light-years (946.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star KOI-3680 has apparent magnitude of 14.3, with absolute magnitude of 4.4.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5830 with its spectral types of G2
  • In this planetary system, the extrasolar planet KOI-3680 b orbits around the star KOI-3680 every 141.2 days with its orbital distance of 0.53 AU ( 79885263.0 km)
  • (Projected orbit of KOI-3680 b around its host star KOI-3680)


  • The Star KOI-3680 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.707 AU ( 105746610.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.977 AU ( 146169450.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.489 AU ( 222729895.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.191 AU ( 327756797.8 km)
  • Radiation at Planetary Boundary of KOI-3680 b : 4578.67 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KOI-3680)



  • Kopparapu Recent Venus for Star KOI-3680 distance : 0.730 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KOI-3680 distance : 0.925 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KOI-3680 distance : 0.893 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KOI-3680 distance : 0.979 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-3680 distance : 1.631 AU
  • Kopparapu Outer Boundary for Early Mars for Star KOI-3680 distance : 1.720 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KOI-3680)



  • Original Kopparapu Recent Venus for Star KOI-3680 distance : 0.732 AU
  • Original Kopparapu Runaway Greenhouse for Star KOI-3680 distance : 0.950 AU
  • Original Kopparapu Moist Greenhouse for Star KOI-3680 distance : 0.969 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KOI-3680 distance : 1.660 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KOI-3680 distance : 1.726 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KOI-3680)



    (Position in Stellar Map of star KOI-3680 and its Exoplanet KOI-3680 b)



    (Zoomed position in Stellar Map of star KOI-3680 and its Exoplanet KOI-3680 b (zoom level 3))

    (Synthetic Spectrum of star KOI-3680*)
    *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