Imaginary Picture of Kepler-491 b
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Exoplanet Name : Kepler-491 b
Alternate Name :
Radius (Rjup / Re): 0.7960 (Rjup) 8.9224 (Rearth)
Mass (Mjup / Me): 0.4944 (Mjup) 157.1848 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0518 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0116
Orbital Period(Observed/Estimated) 4.23 (Days Obs.) 0.00 (Days Est.)
Star Radiation at Atmospheric Boundary: 422858.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1138.1 (K)
Blackbody T 0.3(K) 1068.8 (K)
Blackbody T 0.7(K) 864.8 (K)
Tidally Locked Blackbody T 0.1(K) 1353.5 (K)
Tidally Locked Blackbody T 0.3(K) 1271.1 (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-491
Alternate Name :
Star Distance(LY) : 2056.5
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5522 (K)
Spectral type : G6
Metalicity : 0.4
Absolute Magnitude: 3.7
Apparent Magnitude: 12.7
Right Ascension(RA) 287.1306
Declination (DEC) 42.3502
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 434 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-491%20b/
Kepler-491 b
Kepler-491 b

  • Kepler-491 b is an exoplanet orbiting the star Kepler-491, located about 2056.5 light-years (630.5 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-491 has apparent magnitude of 12.7, with absolute magnitude of 3.7.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5522 with its spectral types of G6
  • In this planetary system, the extrasolar planet Kepler-491 b orbits around the star Kepler-491 every 4.2 days with its orbital distance of 0.05 AU ( 7752715.8 km)
  • (Projected orbit of Kepler-491 b around its host star Kepler-491)


  • The Star Kepler-491 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.659 AU ( 98623737.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.911 AU ( 136323779.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.389 AU ( 207727271.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.043 AU ( 305679779.4 km)
  • Radiation at Planetary Boundary of Kepler-491 b : 422858.04 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-491)



  • Kopparapu Recent Venus for Star Kepler-491 distance : 0.694 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-491 distance : 0.878 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-491 distance : 0.848 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-491 distance : 0.930 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-491 distance : 1.563 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-491 distance : 1.648 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-491)



  • Original Kopparapu Recent Venus for Star Kepler-491 distance : 0.691 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-491 distance : 0.903 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-491 distance : 0.915 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-491 distance : 1.590 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-491 distance : 1.653 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-491)



    (Position in Stellar Map of star Kepler-491 and its Exoplanet Kepler-491 b)



    (Zoomed position in Stellar Map of star Kepler-491 and its Exoplanet Kepler-491 b (zoom level 3))