Imaginary Picture of Kepler-1311 d

Display orbital revolution of Kepler-1311 d around the hoststar Kepler-1311
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Exoplanet Name : Kepler-1311 d
Alternate Name : "KOI-2674 d, KOI-2674.01"
Status : Confirmed
Radius (Rjup / Re): 0.8616 (Rjup) 9.6577 (Rearth)
Mass (Mjup / Me): 0.6270 (Mjup) 199.3372 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.6711 (AU) 0.6711 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.5407
Orbital Period(Observed/Estimated) 197.51 (Days Obs.) 198.83 (Days Est.)
Surface Gravity (G Earth) 2.1372
Star Radiation at Atmospheric Boundary: 8951.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 434.1 (K)
Blackbody T 0.3(K) 407.7 (K)
Blackbody T 0.7(K) 329.9 (K)
Tidally Locked Blackbody T 0.1(K) 516.3 (K)
Tidally Locked Blackbody T 0.3(K) 484.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-1311
Alternate Name : "2MASS J19183630+4349279, KIC 8022489, KOI-2674, WISE J191836.30+434927.9"
Star Distance(LY) : 2825.6
Stellar Radius(Rsun) : 1.8 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 7.6 (GY)
Temperature : 5719 (K)
Spectral type : G2IV
UV portion[%]: 7.7
Visible portion[%]: 44.5
IR portion[%]: 47.8
Metalicity : 0.1
Absolute Magnitude: 3.8
Apparent Magnitude: 13.5
Right Ascension(RA) 289.6513
Declination (DEC) 43.8244
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-1311 d
Kepler-1311 d

  • Kepler-1311 d is an exoplanet orbiting the star Kepler-1311, located about 2825.6 light-years (866.3 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star Kepler-1311 has apparent magnitude of 13.5, with absolute magnitude of 3.8.
  • It is 1.0 times more massive and 1.8 times bigger compared with our Sun. The surface temperature is 5719 with its spectral types of G2IV
  • In this planetary system, the extrasolar planet Kepler-1311 d orbits around the star Kepler-1311 every 197.5 days with its orbital distance of 0.67 AU ( 100395131.0 km)
  • (Projected orbit of Kepler-1311 d around its host star Kepler-1311)


  • The Star Kepler-1311 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.242 AU ( 185814765.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.717 AU ( 256844565.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.616 AU ( 391374277.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.850 AU ( 575924394.7 km)
  • Radiation at Planetary Boundary of Kepler-1311 d : 8951.06 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-1311)



  • Kopparapu Recent Venus for Star Kepler-1311 distance : 1.292 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-1311 distance : 1.636 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-1311 distance : 1.580 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-1311 distance : 1.732 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1311 distance : 2.894 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-1311 distance : 3.052 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-1311)



  • Original Kopparapu Recent Venus for Star Kepler-1311 distance : 1.292 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-1311 distance : 1.682 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-1311 distance : 1.710 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-1311 distance : 2.944 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-1311 distance : 3.062 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-1311)



    (Position in Stellar Map of star Kepler-1311 and its Exoplanet Kepler-1311 d)



    (Zoomed position in Stellar Map of star Kepler-1311 and its Exoplanet Kepler-1311 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-1311*)
    *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