Imaginary Picture of HAT-P-7 b

Display orbital revolution of HAT-P-7 b around the hoststar HAT-P-7
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Exoplanet Name : HAT-P-7 b
Alternate Name : Kepler-2 b
Status : Confirmed
Radius (Rjup / Re): 1.4310 (Rjup) 16.0401 (Rearth)
Mass (Mjup / Me): 1.7410 (Mjup) 553.5301 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0379 (AU) 0.0379 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0060
Orbital Period(Observed/Estimated) 2.20 (Days Obs.) 2.19 (Days Est.)
Surface Gravity (G Earth) 2.1514
Star Radiation at Atmospheric Boundary: 5853807.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 2195.3 (K)
Blackbody T 0.3(K) 2061.7 (K)
Blackbody T 0.7(K) 1668.1 (K)
Tidally Locked Blackbody T 0.1(K) 2610.7 (K)
Tidally Locked Blackbody T 0.3(K) 2451.7 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HAT-P-7
Alternate Name :
Star Distance(LY) : 1112.2
Stellar Radius(Rsun) : 2.0 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 2.1 (GY)
Temperature : 6449 (K)
Spectral type : F8
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.1
Absolute Magnitude: 2.8
Apparent Magnitude: 10.5
Right Ascension(RA) 292.2473
Declination (DEC) 47.9694
Hubble Space Telescope Guide Star Catalog (GSC) ID 03547-01402
Discovered by
Discovery Paper - Authors HOG E.; FABRICIUS C.; MAKAROV V.V.; URBAN S.; CORBIN T.; WYCOFF G.; BASTIAN U.; SCHWEKENDIEK P.; WICENEC A.
Discovery Paper - Title The Tycho-2 catalogue of the 2.5 million brightest stars.
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-7+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HAT-P-7%20b/
HAT-P-7 b
HAT-P-7 b
  • HAT-P-7 b is an exoplanet orbiting the star HAT-P-7, located about 1112.2 light-years (341.0 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star HAT-P-7 has apparent magnitude of 10.5, with absolute magnitude of 2.8.
  • It is 1.5 times more massive and 2.0 times bigger compared with our Sun. The surface temperature is 6449 with its spectral types of F8
  • In this planetary system, the extrasolar planet HAT-P-7 b orbits around the star HAT-P-7 every 2.2 days with its orbital distance of 0.04 AU ( 5669759.3 km)
    • (Projected orbit of HAT-P-7 b around its host star HAT-P-7)


  • The Star HAT-P-7 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.794 AU ( 268357740.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.480 AU ( 370940527.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.778 AU ( 565231274.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.560 AU ( 831762582.2 km)
  • Radiation at Planetary Boundary of HAT-P-7 b : 5853807.25 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-7)



  • Kopparapu Recent Venus for Star HAT-P-7 distance : 1.785 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-7 distance : 2.261 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-7 distance : 2.184 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-7 distance : 2.393 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-7 distance : 3.937 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-7 distance : 4.152 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-7)



  • Original Kopparapu Recent Venus for Star HAT-P-7 distance : 1.814 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-7 distance : 2.318 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-7 distance : 2.400 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-7 distance : 4.008 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-7 distance : 4.168 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-7)



    (Position in Stellar Map of star HAT-P-7 and its Exoplanet HAT-P-7 b)



    (Zoomed position in Stellar Map of star HAT-P-7 and its Exoplanet HAT-P-7 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-7*)
    *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