Imaginary Picture of Kepler-1291 b

Display orbital revolution of Kepler-1291 b around the hoststar Kepler-1291
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Exoplanet Name : Kepler-1291 b
Alternate Name : "2MASS J19173048+4000041 b, K02617.01, KIC 4915638 b, KOI-2617 b, KOI-2617.01, WISE J191730.51+400003.6 b"
Status : Confirmed
Radius (Rjup / Re): 0.1480 (Rjup) 1.6589 (Rearth)
Mass (Mjup / Me): 0.0133 (Mjup) 4.2243 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0777 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0236
Orbital Period(Observed/Estimated) 8.63 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5350
Star Radiation at Atmospheric Boundary: 86261.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 764.9 (K)
Blackbody T 0.3(K) 718.3 (K)
Blackbody T 0.7(K) 581.2 (K)
Tidally Locked Blackbody T 0.1(K) 909.6 (K)
Tidally Locked Blackbody T 0.3(K) 854.2 (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-1291
Alternate Name : "2MASS J19173048+4000041, KIC 4915638, KOI-2617, WISE J191730.51+400003.6"
Star Distance(LY) : 2929.3
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 4.9 (GY)
Temperature : 5346 (K)
Spectral type : K0
UV portion[%]: 5.1
Visible portion[%]: 40.4
IR portion[%]: 54.5
Metalicity : -0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 14.4
Right Ascension(RA) 289.3770
Declination (DEC) 40.0012
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Timothy D. Morton1, Stephen T. Bryson2, Jeffrey L. Coughlin2,3, Jason F. Rowe4, Ganesh Ravichandran5, Erik A. Petigura6,7, Michael R. Haas2, and Natalie M. Batalha16"
Discovery Paper - Title FALSE POSITIVE PROBABILITIES FOR ALL KEPLER OBJECTS OF INTEREST: 1284 NEWLY VALIDATED PLANETS AND 433 LIKELY FALSE POSITIVES
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-1291+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-1291%20b/
Kepler-1291 b
Kepler-1291 b

  • Kepler-1291 b is an exoplanet orbiting the star Kepler-1291, located about 2929.3 light-years (898.1 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-1291 has apparent magnitude of 14.4, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 5346 with its spectral types of K0
  • In this planetary system, the extrasolar planet Kepler-1291 b orbits around the star Kepler-1291 every 8.6 days with its orbital distance of 0.08 AU ( 11622870.7 km)
  • (Projected orbit of Kepler-1291 b around its host star Kepler-1291)


  • The Star Kepler-1291 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.446 AU ( 66780749.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.617 AU ( 92308447.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.940 AU ( 140657645.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.384 AU ( 206983887.2 km)
  • Radiation at Planetary Boundary of Kepler-1291 b : 86261.14 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1291)



  • Kopparapu Recent Venus for Star Kepler-1291 distance : 0.474 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1291 distance : 0.601 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1291 distance : 0.580 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1291 distance : 0.636 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1291 distance : 1.075 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1291 distance : 1.134 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1291)



  • Original Kopparapu Recent Venus for Star Kepler-1291 distance : 0.471 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1291 distance : 0.618 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1291 distance : 0.624 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1291 distance : 1.093 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1291 distance : 1.137 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1291)



    (Position in Stellar Map of star Kepler-1291 and its Exoplanet Kepler-1291 b)



    (Zoomed position in Stellar Map of star Kepler-1291 and its Exoplanet Kepler-1291 b (zoom level 3))

    (Synthetic Spectrum of star Kepler-1291*)
    *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