Imaginary Picture of KELT-8 b

Display orbital revolution of KELT-8 b around the hoststar KELT-8
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Exoplanet Name : KELT-8 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.8600 (Rjup) 20.8487 (Rearth)
Mass (Mjup / Me): 0.8740 (Mjup) 277.8778 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0457 (AU) 0.0457 (AU Est.)
Eccentricity : 0.0350
Orbital Period(Yrs) 0.0089
Orbital Period(Observed/Estimated) 3.24 (Days Obs.) 3.24 (Days Est.)
Surface Gravity (G Earth) 0.6393
Star Radiation at Atmospheric Boundary: 1794298.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1633.5 (K)
Blackbody T 0.3(K) 1534.0 (K)
Blackbody T 0.7(K) 1241.2 (K)
Tidally Locked Blackbody T 0.1(K) 1942.6 (K)
Tidally Locked Blackbody T 0.3(K) 1824.3 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KELT-8
Alternate Name : HD 343246
Star Distance(LY) : 769.7
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 5.4 (GY)
Temperature : 5754 (K)
Spectral type : G2V
UV portion[%]: 7.8
Visible portion[%]: 44.7
IR portion[%]: 47.6
Metalicity : 0.3
Absolute Magnitude: 4.0
Apparent Magnitude: 10.8
Right Ascension(RA) 283.3055
Declination (DEC) 24.1275
Hubble Space Telescope Guide Star Catalog (GSC) ID 02109-00049
Discovered by
Discovery Paper - Authors "Allyson Bieryla, Karen Collins, Thomas G. Beatty, Jason Eastman, Robert J. Siverd, Joshua Pepper, B. Scott Gaudi, Keivan G. Stassun, Caleb Canas, David W. Latham, Lars A. Buchhave, Roberto Sanchis-Ojeda, Joshua N. Winn, Eric L. N. Jensen, John F. Kielkopf, Kim K. McLeod, Joao Gregorio, Knicole D. Colon, Rachel Street, Rachel Ross, Matthew Penny, Samuel N. Mellon, Thomas E. Oberst, Benjamin J. Fulton, Ji Wang, Perry Berlind, Michael L. Calkins, Gilbert A. Esquerdo, Darren L. DePoy, Andrew Gould, Jennifer Marshall, Richard Pogge, Mark Trueblood, Patricia Trueblood"
Discovery Paper - Title KELT-7b: A hot Jupiter transiting a bright V=8.54 rapidly rotating F-star
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KELT-8+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/KELT-8%20b/
KELT-8 b
KELT-8 b
  • KELT-8 b is an exoplanet orbiting the star KELT-8, located about 769.7 light-years (236.0 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star KELT-8 has apparent magnitude of 10.8, with absolute magnitude of 4.0.
  • It is 1.2 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 5754 with its spectral types of G2V
  • In this planetary system, the extrasolar planet KELT-8 b orbits around the star KELT-8 every 3.2 days with its orbital distance of 0.05 AU ( 6838118.7 km)
    • (Projected orbit of KELT-8 b around its host star KELT-8)


  • The Star KELT-8 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.198 AU ( 179190218.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.656 AU ( 247687709.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.523 AU ( 377421256.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.713 AU ( 555391912.8 km)
  • Radiation at Planetary Boundary of KELT-8 b : 1794298.69 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KELT-8)



  • Kopparapu Recent Venus for Star KELT-8 distance : 1.243 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KELT-8 distance : 1.574 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KELT-8 distance : 1.521 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KELT-8 distance : 1.667 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KELT-8 distance : 2.782 AU
  • Kopparapu Outer Boundary for Early Mars for Star KELT-8 distance : 2.934 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KELT-8)



  • Original Kopparapu Recent Venus for Star KELT-8 distance : 1.244 AU
  • Original Kopparapu Runaway Greenhouse for Star KELT-8 distance : 1.618 AU
  • Original Kopparapu Moist Greenhouse for Star KELT-8 distance : 1.646 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KELT-8 distance : 2.831 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KELT-8 distance : 2.944 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KELT-8)



    (Position in Stellar Map of star KELT-8 and its Exoplanet KELT-8 b)



    (Zoomed position in Stellar Map of star KELT-8 and its Exoplanet KELT-8 b (zoom level 3))

    (Synthetic Spectrum of star KELT-8*)
    *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