Imaginary Picture of HD 202772 A b
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Exoplanet Name : HD 202772 A b
Alternate Name :
Radius (Rjup / Re): 1.5450 (Rjup) 17.3179 (Rearth)
Mass (Mjup / Me): 1.0170 (Mjup) 323.3429 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0521 (AU) 0.0521 (AU Est.)
Eccentricity : 0.0380
Orbital Period(Yrs) 0.0091
Orbital Period(Observed/Estimated) 3.31 (Days Obs.) 3.31 (Days Est.)
Star Radiation at Atmospheric Boundary: 4697014.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 2077.8 (K)
Blackbody T 0.3(K) 1951.2 (K)
Blackbody T 0.7(K) 1578.8 (K)
Tidally Locked Blackbody T 0.1(K) 2470.9 (K)
Tidally Locked Blackbody T 0.3(K) 2320.4 (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 : HD 202772 A
Alternate Name : "TIC 290131778, HD 202772"
Star Distance(LY) : 529.0
Stellar Radius(Rsun) : 2.6 (Rsun Measured)
Stellar Mass(Msun) : 1.7 (Msun Measured) 1.7 (Msun Estimated)
Star Age : 1.8 (GY)
Temperature : 6272 (K)
Spectral type : F8
Metalicity : 0.3
Absolute Magnitude: 2.3
Apparent Magnitude: 8.3
Right Ascension(RA) 319.6995
Declination (DEC) -26.6164
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=HD+202772+A+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 202772 A b
HD 202772 A b

  • HD 202772 A b is an exoplanet orbiting the star HD 202772 A, located about 529.0 light-years (162.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star HD 202772 A has apparent magnitude of 8.3, with absolute magnitude of 2.3.
  • It is 1.7 times more massive and 2.6 times bigger compared with our Sun. The surface temperature is 6272 with its spectral types of F8
  • In this planetary system, the extrasolar planet HD 202772 A b orbits around the star HD 202772 A every 3.3 days with its orbital distance of 0.05 AU ( 7791057.1 km)
  • (Projected orbit of HD 202772 A b around its host star HD 202772 A)


  • The Star HD 202772 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.208 AU ( 330322095.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 3.052 AU ( 456591459.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 4.651 AU ( 695744340.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 6.844 AU ( 1023818275.7 km)
  • Radiation at Planetary Boundary of HD 202772 A b : 4697014.32 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 202772 A)



  • Kopparapu Recent Venus for Star HD 202772 A distance : 2.221 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 202772 A distance : 2.813 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 202772 A distance : 2.716 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 202772 A distance : 2.977 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 202772 A distance : 4.912 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 202772 A distance : 5.180 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 202772 A)



  • Original Kopparapu Recent Venus for Star HD 202772 A distance : 2.247 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 202772 A distance : 2.885 AU
  • Original Kopparapu Moist Greenhouse for Star HD 202772 A distance : 2.974 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 202772 A distance : 5.000 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 202772 A distance : 5.200 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 202772 A)



    (Position in Stellar Map of star HD 202772 A and its Exoplanet HD 202772 A b)



    (Zoomed position in Stellar Map of star HD 202772 A and its Exoplanet HD 202772 A b (zoom level 3))