Imaginary Picture of Kepler-1680 b

Display orbital revolution of Kepler-1680 b around the hoststar Kepler-1680
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Exoplanet Name : Kepler-1680 b
Alternate Name : "2MASS J19481791+3956018 b, K02120.01, KIC 4857213 b, KOI-2120 b, KOI-2120.01, WISE J194817.91+395601.9 b"
Status : Confirmed
Radius (Rjup / Re): 0.1210 (Rjup) 1.3563 (Rearth)
Mass (Mjup / Me): 0.0093 (Mjup) 2.9437 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0784 (AU) 0.0784 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0240
Orbital Period(Observed/Estimated) 8.77 (Days Obs.) 8.79 (Days Est.)
Surface Gravity (G Earth) 1.6002
Star Radiation at Atmospheric Boundary: 59888.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 698.2 (K)
Blackbody T 0.3(K) 655.7 (K)
Blackbody T 0.7(K) 530.5 (K)
Tidally Locked Blackbody T 0.1(K) 830.3 (K)
Tidally Locked Blackbody T 0.3(K) 779.7 (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-1680
Alternate Name : "4857213, 2MASS J19481791+3956018, KIC 4857213, KOI-2120, WISE J194817.91+395601.9"
Star Distance(LY) : 1021.3
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4975 (K)
Spectral type : K2
UV portion[%]: 3.1
Visible portion[%]: 36.8
IR portion[%]: 60.1
Metalicity : 0.2
Absolute Magnitude: 5.9
Apparent Magnitude: 13.4
Right Ascension(RA) 297.0747
Declination (DEC) 39.9339
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-1680+&submit=SIMBAD+search
Open Exoplanet Database Link
Kepler-1680 b
Kepler-1680 b

  • Kepler-1680 b is an exoplanet orbiting the star Kepler-1680, located about 1021.3 light-years (313.1 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star Kepler-1680 has apparent magnitude of 13.4, with absolute magnitude of 5.9.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4975 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-1680 b orbits around the star Kepler-1680 every 8.8 days with its orbital distance of 0.08 AU ( 11728473.1 km)
  • (Projected orbit of Kepler-1680 b around its host star Kepler-1680)


  • The Star Kepler-1680 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.375 AU ( 56149038.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.519 AU ( 77612644.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.791 AU ( 118264494.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.163 AU ( 174031384.6 km)
  • Radiation at Planetary Boundary of Kepler-1680 b : 59888.18 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1680)



  • Kopparapu Recent Venus for Star Kepler-1680 distance : 0.407 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1680 distance : 0.515 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1680 distance : 0.497 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1680 distance : 0.546 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1680 distance : 0.934 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1680 distance : 0.985 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1680)



  • Original Kopparapu Recent Venus for Star Kepler-1680 distance : 0.402 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1680 distance : 0.530 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1680 distance : 0.532 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1680 distance : 0.949 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1680 distance : 0.987 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1680)



    (Position in Stellar Map of star Kepler-1680 and its Exoplanet Kepler-1680 b)



    (Zoomed position in Stellar Map of star Kepler-1680 and its Exoplanet Kepler-1680 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1680*)
    *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