Imaginary Picture of Kepler-191 d

Display orbital revolution of Kepler-191 d around the hoststar Kepler-191
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Exoplanet Name : Kepler-191 d
Alternate Name : "2MASS J19244401+4519234 d, K00582.01, KIC 9020160 d, KOI-582 d, KOI-582.01, WISE J192444.01+451923.1 d"
Status : Confirmed
Radius (Rjup / Re): 0.2030 (Rjup) 2.2754 (Rearth)
Mass (Mjup / Me): 0.0178 (Mjup) 5.6674 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0608 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0163
Orbital Period(Observed/Estimated) 5.95 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.0946
Star Radiation at Atmospheric Boundary: 169535.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 905.6 (K)
Blackbody T 0.3(K) 850.5 (K)
Blackbody T 0.7(K) 688.1 (K)
Tidally Locked Blackbody T 0.1(K) 1077.0 (K)
Tidally Locked Blackbody T 0.3(K) 1011.4 (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-191
Alternate Name : "2MASS J19244401+4519234, KIC 9020160, KOI-582, WISE J192444.01+451923.1"
Star Distance(LY) : 1856.6
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5105 (K)
Spectral type : K0
UV portion[%]: 4.0
Visible portion[%]: 38.5
IR portion[%]: 57.5
Metalicity : 0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 13.4
Right Ascension(RA) 291.1834
Declination (DEC) 45.3232
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-191+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-191%20d/
Kepler-191 d
Kepler-191 d

  • Kepler-191 d is an exoplanet orbiting the star Kepler-191, located about 1856.6 light-years (569.2 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-191 has apparent magnitude of 13.4, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5105 with its spectral types of K0
  • In this planetary system, the extrasolar planet Kepler-191 d orbits around the star Kepler-191 every 5.9 days with its orbital distance of 0.06 AU ( 9101398.7 km)
  • (Projected orbit of Kepler-191 d around its host star Kepler-191)


  • The Star Kepler-191 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.490 AU ( 73311031.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.677 AU ( 101335004.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.032 AU ( 154412120.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.519 AU ( 227224200.1 km)
  • Radiation at Planetary Boundary of Kepler-191 d : 169535.94 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-191)



  • Kopparapu Recent Venus for Star Kepler-191 distance : 0.527 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-191 distance : 0.668 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-191 distance : 0.645 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-191 distance : 0.708 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-191 distance : 1.205 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-191 distance : 1.271 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-191)



  • Original Kopparapu Recent Venus for Star Kepler-191 distance : 0.522 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-191 distance : 0.688 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-191 distance : 0.691 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-191 distance : 1.226 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-191 distance : 1.275 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-191)



    (Position in Stellar Map of star Kepler-191 and its Exoplanet Kepler-191 d)



    (Zoomed position in Stellar Map of star Kepler-191 and its Exoplanet Kepler-191 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-191*)
    *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