Imaginary Picture of KELT-23A b
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Exoplanet Name : KELT-23A b
Alternate Name :
Radius (Rjup / Re): 1.3230 (Rjup) 14.8295 (Rearth)
Mass (Mjup / Me): 0.9380 (Mjup) 298.2258 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0330 (AU) 0.0330 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0062
Orbital Period(Observed/Estimated) 2.26 (Days Obs.) 2.26 (Days Est.)
Star Radiation at Atmospheric Boundary: 1351085.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1521.6 (K)
Blackbody T 0.3(K) 1429.0 (K)
Blackbody T 0.7(K) 1156.2 (K)
Tidally Locked Blackbody T 0.1(K) 1809.6 (K)
Tidally Locked Blackbody T 0.3(K) 1699.4 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Spectrum
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : KELT-23A
Alternate Name : BD+66 911
Star Distance(LY) : 413.3
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 6.4 (GY)
Temperature : 5899 (K)
Spectral type : G1
Metalicity : -0.1
Absolute Magnitude: 4.9
Apparent Magnitude: 10.4
Right Ascension(RA) 232.1466
Declination (DEC) 66.3589
Hubble Space Telescope Guide Star Catalog (GSC) ID 04187-00996
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=KELT-23A+&submit=SIMBAD+search
Open Exoplanet Database Link
KELT-23A b
KELT-23A b

  • KELT-23A b is an exoplanet orbiting the star KELT-23A, located about 413.3 light-years (126.7 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star KELT-23A has apparent magnitude of 10.4, with absolute magnitude of 4.9.
  • It is 0.9 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5899 with its spectral types of G1
  • In this planetary system, the extrasolar planet KELT-23A b orbits around the star KELT-23A every 2.3 days with its orbital distance of 0.03 AU ( 4939721.7 km)
  • (Projected orbit of KELT-23A b around its host star KELT-23A)


  • The Star KELT-23A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.751 AU ( 112324435.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.038 AU ( 155261723.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.581 AU ( 236584506.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.327 AU ( 348144465.9 km)
  • Radiation at Planetary Boundary of KELT-23A b : 1351085.81 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star KELT-23A)



  • Kopparapu Recent Venus for Star KELT-23A distance : 0.773 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star KELT-23A distance : 0.978 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star KELT-23A distance : 0.945 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star KELT-23A distance : 1.036 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star KELT-23A distance : 1.722 AU
  • Kopparapu Outer Boundary for Early Mars for Star KELT-23A distance : 1.817 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star KELT-23A)



  • Original Kopparapu Recent Venus for Star KELT-23A distance : 0.775 AU
  • Original Kopparapu Runaway Greenhouse for Star KELT-23A distance : 1.005 AU
  • Original Kopparapu Moist Greenhouse for Star KELT-23A distance : 1.026 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star KELT-23A distance : 1.753 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star KELT-23A distance : 1.823 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star KELT-23A)



    (Position in Stellar Map of star KELT-23A and its Exoplanet KELT-23A b)



    (Zoomed position in Stellar Map of star KELT-23A and its Exoplanet KELT-23A b (zoom level 3))