Imaginary Picture of KIC 8121913 b

Display orbital revolution of KIC 8121913 b around the hoststar KIC 8121913
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Exoplanet Name : KIC 8121913 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.1000 (Mjup) 667.6698 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0491 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0090
Orbital Period(Observed/Estimated) 3.29 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 6.4479
Star Radiation at Atmospheric Boundary: 3231043.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1892.2 (K)
Blackbody T 0.3(K) 1777.0 (K)
Blackbody T 0.7(K) 1437.8 (K)
Tidally Locked Blackbody T 0.1(K) 2250.3 (K)
Tidally Locked Blackbody T 0.3(K) 2113.2 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Default
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KIC 8121913
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 2.2 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5975 (K)
Spectral type : G1
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.3
Absolute Magnitude: 25.0
Apparent Magnitude: 22.0
Right Ascension(RA) 298.9678
Declination (DEC) 43.9094
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KIC+8121913&submit=SIMBAD+search
Open Exoplanet Database Link
KIC 8121913 b
KIC 8121913 b

  • KIC 8121913 b is an exoplanet orbiting the star KIC 8121913. Its discovery was publicly announced on 2021.
  • The host star KIC 8121913 has apparent magnitude of 22.0, with absolute magnitude of 25.0.
  • It is 1.5 times more massive and 2.2 times bigger compared with our Sun. The surface temperature is 5975 with its spectral types of G1
  • In this planetary system, the extrasolar planet KIC 8121913 b orbits around the star KIC 8121913 every 3.3 days with its orbital distance of 0.05 AU ( 7347184.4 km)
  • (Projected orbit of KIC 8121913 b around its host star KIC 8121913)


  • The Star KIC 8121913 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.727 AU ( 258358440.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.387 AU ( 357118882.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.638 AU ( 544170146.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.353 AU ( 800770208.8 km)
  • Radiation at Planetary Boundary of KIC 8121913 b : 3231043.79 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KIC 8121913)



  • Kopparapu Recent Venus for Star KIC 8121913 distance : 1.769 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KIC 8121913 distance : 2.240 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KIC 8121913 distance : 2.163 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KIC 8121913 distance : 2.371 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KIC 8121913 distance : 3.936 AU
  • Kopparapu Outer Boundary for Early Mars for Star KIC 8121913 distance : 4.151 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KIC 8121913)



  • Original Kopparapu Recent Venus for Star KIC 8121913 distance : 1.778 AU
  • Original Kopparapu Runaway Greenhouse for Star KIC 8121913 distance : 2.300 AU
  • Original Kopparapu Moist Greenhouse for Star KIC 8121913 distance : 2.353 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KIC 8121913 distance : 4.006 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KIC 8121913 distance : 4.166 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KIC 8121913)



    (Position in Stellar Map of star KIC 8121913 and its Exoplanet KIC 8121913 b)



    (Zoomed position in Stellar Map of star KIC 8121913 and its Exoplanet KIC 8121913 b (zoom level 3))

    (Synthetic Spectrum of star KIC 8121913*)
    *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