Imaginary Picture of Kepler-681 b

Display orbital revolution of Kepler-681 b around the hoststar Kepler-681
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Exoplanet Name : Kepler-681 b
Alternate Name : "2MASS J19173593+5115011 b, K00788.01, KIC 12404086 b, KOI-788 b, KOI-788.01"
Status : Confirmed
Radius (Rjup / Re): 0.2750 (Rjup) 3.0825 (Rearth)
Mass (Mjup / Me): 0.0236 (Mjup) 7.5161 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.1611 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0723
Orbital Period(Observed/Estimated) 26.39 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.7910
Star Radiation at Atmospheric Boundary: 19894.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 530.1 (K)
Blackbody T 0.3(K) 497.8 (K)
Blackbody T 0.7(K) 402.8 (K)
Tidally Locked Blackbody T 0.1(K) 630.4 (K)
Tidally Locked Blackbody T 0.3(K) 592.0 (K)
Size Class: sub-Neptune-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-681
Alternate Name : "2MASS J19173593+5115011, KIC 12404086, KOI-788"
Star Distance(LY) : 2240.1
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 5.0 (GY)
Temperature : 5125 (K)
Spectral type : K2
UV portion[%]: 3.4
Visible portion[%]: 37.3
IR portion[%]: 59.3
Metalicity : -0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 13.8
Right Ascension(RA) 289.3997
Declination (DEC) 51.2503
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton, Stephen T. Bryson, Jeffrey L. Coughlin, Jason F. Rowe, Ganesh Ravichandran, Erik A. Petigura, Michael R. Haas, and Natalie M. Batalha"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 583 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-681+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-681%20b/
Kepler-681 b
Kepler-681 b

  • Kepler-681 b is an exoplanet orbiting the star Kepler-681, located about 2240.1 light-years (686.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-681 has apparent magnitude of 13.8, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5125 with its spectral types of K2
  • In this planetary system, the extrasolar planet Kepler-681 b orbits around the star Kepler-681 every 26.4 days with its orbital distance of 0.16 AU ( 24093652.5 km)
  • (Projected orbit of Kepler-681 b around its host star Kepler-681)


  • The Star Kepler-681 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.444 AU ( 66480899.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.614 AU ( 91893976.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.936 AU ( 140026084.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.377 AU ( 206054516.7 km)
  • Radiation at Planetary Boundary of Kepler-681 b : 19894.26 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-681)



  • Kopparapu Recent Venus for Star Kepler-681 distance : 0.478 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-681 distance : 0.605 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-681 distance : 0.584 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-681 distance : 0.641 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-681 distance : 1.091 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-681 distance : 1.151 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-681)



  • Original Kopparapu Recent Venus for Star Kepler-681 distance : 0.473 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-681 distance : 0.623 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-681 distance : 0.626 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-681 distance : 1.110 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-681 distance : 1.154 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-681)



    (Position in Stellar Map of star Kepler-681 and its Exoplanet Kepler-681 b)



    (Zoomed position in Stellar Map of star Kepler-681 and its Exoplanet Kepler-681 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-681*)
    *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