Imaginary Picture of KELT-22A b
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Exoplanet Name : KELT-22A b
Alternate Name : WASP-173A b
Radius (Rjup / Re): 1.2000 (Rjup) 13.4508 (Rearth)
Mass (Mjup / Me): 3.6900 (Mjup) 1173.1912 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0248 (AU) 0.0248 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0038
Orbital Period(Observed/Estimated) 1.39 (Days Obs.) 1.39 (Days Est.)
Star Radiation at Atmospheric Boundary: 2593264.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1791.0 (K)
Blackbody T 0.3(K) 1682.0 (K)
Blackbody T 0.7(K) 1360.9 (K)
Tidally Locked Blackbody T 0.1(K) 2129.9 (K)
Tidally Locked Blackbody T 0.3(K) 2000.2 (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 : Kelt-22A
Alternate Name : "WASP-173A, WDS23366-3437"
Star Distance(LY) : 765.0
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 5.0 (GY)
Temperature : 5700 (K)
Spectral type : G3
Metalicity : 0.2
Absolute Magnitude: 4.4
Apparent Magnitude: 11.3
Right Ascension(RA) 354.1682
Declination (DEC) -34.6114
Hubble Space Telescope Guide Star Catalog (GSC) ID
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-22A+&submit=SIMBAD+search
Open Exoplanet Database Link
KELT-22A b
KELT-22A b

  • KELT-22A b is an exoplanet orbiting the star Kelt-22A, located about 765.0 light-years (234.5 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star Kelt-22A has apparent magnitude of 11.3, with absolute magnitude of 4.4.
  • It is 1.1 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5700 with its spectral types of G3
  • In this planetary system, the extrasolar planet KELT-22A b orbits around the star Kelt-22A every 1.4 days with its orbital distance of 0.02 AU ( 3710027.2 km)
  • (Projected orbit of KELT-22A b around its host star Kelt-22A)


  • The Star Kelt-22A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.781 AU ( 116877470.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.080 AU ( 161555207.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.646 AU ( 246174384.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.422 AU ( 362256390.4 km)
  • Radiation at Planetary Boundary of KELT-22A b : 2593264.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kelt-22A)



  • Kopparapu Recent Venus for Star Kelt-22A distance : 0.814 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kelt-22A distance : 1.030 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kelt-22A distance : 0.995 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kelt-22A distance : 1.091 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kelt-22A distance : 1.823 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kelt-22A distance : 1.923 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kelt-22A)



  • Original Kopparapu Recent Venus for Star Kelt-22A distance : 0.813 AU
  • Original Kopparapu Runaway Greenhouse for Star Kelt-22A distance : 1.059 AU
  • Original Kopparapu Moist Greenhouse for Star Kelt-22A distance : 1.076 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kelt-22A distance : 1.855 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kelt-22A distance : 1.929 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kelt-22A)



    (Position in Stellar Map of star Kelt-22A and its Exoplanet KELT-22A b)



    (Zoomed position in Stellar Map of star Kelt-22A and its Exoplanet KELT-22A b (zoom level 3))