Imaginary Picture of Kepler-291 b

Display orbital revolution of Kepler-291 b around the hoststar Kepler-291
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Exoplanet Name : Kepler-291 b
Alternate Name : "2MASS J19113992+4226142 b, K01363.01, KIC 6936909 b, KOI-1363 b, KOI-1363.01, WISE J191139.91+422614.2 b"
Radius (Rjup / Re): 0.1930 (Rjup) 2.1633 (Rearth)
Mass (Mjup / Me): 0.0170 (Mjup) 5.4073 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0470 (AU) 0.0470 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0097
Orbital Period(Observed/Estimated) 3.55 (Days Obs.) 3.67 (Days Est.)
Surface Gravity (G Earth) 1.1554
Star Radiation at Atmospheric Boundary: 853555.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1356.6 (K)
Blackbody T 0.3(K) 1274.0 (K)
Blackbody T 0.7(K) 1030.8 (K)
Tidally Locked Blackbody T 0.1(K) 1613.3 (K)
Tidally Locked Blackbody T 0.3(K) 1515.0 (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-291
Alternate Name : "2MASS J19113992+4226142, KIC 6936909, KOI-1363, WISE J191139.91+422614.2"
Star Distance(LY) : 5871.7
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5637 (K)
Spectral type : G0
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.1
Absolute Magnitude: 3.4
Apparent Magnitude: 14.7
Right Ascension(RA) 287.9164
Declination (DEC) 42.4373
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-291+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-291%20b/
Kepler-291 b
Kepler-291 b

  • Kepler-291 b is an exoplanet orbiting the star Kepler-291, located about 5871.7 light-years (1800.3 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-291 has apparent magnitude of 14.7, with absolute magnitude of 3.4.
  • It is 1.0 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5637 with its spectral types of G0
  • In this planetary system, the extrasolar planet Kepler-291 b orbits around the star Kepler-291 every 3.5 days with its orbital distance of 0.05 AU ( 7031099.9 km)
  • (Projected orbit of Kepler-291 b around its host star Kepler-291)


  • The Star Kepler-291 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.849 AU ( 127077698.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.174 AU ( 175654589.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.789 AU ( 267658721.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.633 AU ( 393871534.2 km)
  • Radiation at Planetary Boundary of Kepler-291 b : 853555.08 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-291)



  • Kopparapu Recent Venus for Star Kepler-291 distance : 0.888 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-291 distance : 1.124 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-291 distance : 1.086 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-291 distance : 1.191 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-291 distance : 1.993 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-291 distance : 2.102 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-291)



  • Original Kopparapu Recent Venus for Star Kepler-291 distance : 0.887 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-291 distance : 1.156 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-291 distance : 1.173 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-291 distance : 2.028 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-291 distance : 2.109 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-291)



    (Position in Stellar Map of star Kepler-291 and its Exoplanet Kepler-291 b)



    (Zoomed position in Stellar Map of star Kepler-291 and its Exoplanet Kepler-291 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-291*)
    *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