Imaginary Picture of HAT-P-66 b

Display orbital revolution of HAT-P-66 b around the hoststar HAT-P-66
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Exoplanet Name : HAT-P-66 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.5900 (Rjup) 17.8223 (Rearth)
Mass (Mjup / Me): 0.7830 (Mjup) 248.9455 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0436 (AU) 0.0436 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0081
Orbital Period(Observed/Estimated) 2.97 (Days Obs.) 2.97 (Days Est.)
Surface Gravity (G Earth) 0.7837
Star Radiation at Atmospheric Boundary: 2957984.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1850.9 (K)
Blackbody T 0.3(K) 1738.2 (K)
Blackbody T 0.7(K) 1406.4 (K)
Tidally Locked Blackbody T 0.1(K) 2201.1 (K)
Tidally Locked Blackbody T 0.3(K) 2067.1 (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 : HAT-P-66
Alternate Name :
Star Distance(LY) : 3023.5
Stellar Radius(Rsun) : 1.9 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 4.7 (GY)
Temperature : 6002 (K)
Spectral type : G0
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.2
Apparent Magnitude: 13.0
Right Ascension(RA) 150.5727
Declination (DEC) 53.9509
Hubble Space Telescope Guide Star Catalog (GSC) ID 03814-00307
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-66+&submit=SIMBAD+search
Open Exoplanet Database Link
HAT-P-66 b
HAT-P-66 b

  • HAT-P-66 b is an exoplanet orbiting the star HAT-P-66, located about 3023.5 light-years (927.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star HAT-P-66 has apparent magnitude of 13.0, with absolute magnitude of 3.2.
  • It is 1.3 times more massive and 1.9 times bigger compared with our Sun. The surface temperature is 6002 with its spectral types of G0
  • In this planetary system, the extrasolar planet HAT-P-66 b orbits around the star HAT-P-66 every 3.0 days with its orbital distance of 0.04 AU ( 6526955.1 km)
  • (Projected orbit of HAT-P-66 b around its host star HAT-P-66)


  • The Star HAT-P-66 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.468 AU ( 219603314.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.029 AU ( 303549169.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.092 AU ( 462541759.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.550 AU ( 680650461.1 km)
  • Radiation at Planetary Boundary of HAT-P-66 b : 2957984.81 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-66)



  • Kopparapu Recent Venus for Star HAT-P-66 distance : 1.501 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-66 distance : 1.901 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-66 distance : 1.836 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-66 distance : 2.012 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-66 distance : 3.338 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-66 distance : 3.521 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-66)



  • Original Kopparapu Recent Venus for Star HAT-P-66 distance : 1.510 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-66 distance : 1.952 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-66 distance : 1.998 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-66 distance : 3.397 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-66 distance : 3.533 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-66)



    (Position in Stellar Map of star HAT-P-66 and its Exoplanet HAT-P-66 b)



    (Zoomed position in Stellar Map of star HAT-P-66 and its Exoplanet HAT-P-66 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-66*)
    *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