Imaginary Picture of Kepler-688 b
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Exoplanet Name : Kepler-688 b
Alternate Name :
Radius (Rjup / Re): 0.8710 (Rjup) 9.7630 (Rearth)
Mass (Mjup / Me): 0.6477 (Mjup) 205.9329 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0481 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0107
Orbital Period(Observed/Estimated) 3.90 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 573288.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1228.1 (K)
Blackbody T 0.3(K) 1153.3 (K)
Blackbody T 0.7(K) 933.2 (K)
Tidally Locked Blackbody T 0.1(K) 1460.5 (K)
Tidally Locked Blackbody T 0.3(K) 1371.5 (K)
Size Class: Jupiter-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-688
Alternate Name :
Star Distance(LY) : 4435.5
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5564 (K)
Spectral type : G4
Metalicity : 0.0
Absolute Magnitude: 3.7
Apparent Magnitude: 14.4
Right Ascension(RA) 294.6552
Declination (DEC) 39.3084
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 590 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-688%20b/
Kepler-688 b
Kepler-688 b

  • Kepler-688 b is an exoplanet orbiting the star Kepler-688, located about 4435.5 light-years (1359.9 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-688 has apparent magnitude of 14.4, with absolute magnitude of 3.7.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5564 with its spectral types of G4
  • In this planetary system, the extrasolar planet Kepler-688 b orbits around the star Kepler-688 every 3.9 days with its orbital distance of 0.05 AU ( 7200266.3 km)
  • (Projected orbit of Kepler-688 b around its host star Kepler-688)


  • The Star Kepler-688 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.713 AU ( 106651168.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.985 AU ( 147419786.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.502 AU ( 224635131.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.210 AU ( 330560435.9 km)
  • Radiation at Planetary Boundary of Kepler-688 b : 573288.90 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-688)



  • Kopparapu Recent Venus for Star Kepler-688 distance : 0.748 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-688 distance : 0.948 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-688 distance : 0.915 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-688 distance : 1.004 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-688 distance : 1.684 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-688 distance : 1.776 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-688)



  • Original Kopparapu Recent Venus for Star Kepler-688 distance : 0.746 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-688 distance : 0.974 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-688 distance : 0.987 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-688 distance : 1.713 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-688 distance : 1.781 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-688)



    (Position in Stellar Map of star Kepler-688 and its Exoplanet Kepler-688 b)



    (Zoomed position in Stellar Map of star Kepler-688 and its Exoplanet Kepler-688 b (zoom level 3))