Imaginary Picture of HAT-P-3 b
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Exoplanet Name : HAT-P-3 b
Alternate Name :
Radius (Rjup / Re): 0.8270 (Rjup) 9.2698 (Rearth)
Mass (Mjup / Me): 0.5910 (Mjup) 187.9014 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0387 (AU) 0.0387 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0079
Orbital Period(Observed/Estimated) 2.90 (Days Obs.) 2.90 (Days Est.)
Star Radiation at Atmospheric Boundary: 390110.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1115.4 (K)
Blackbody T 0.3(K) 1047.5 (K)
Blackbody T 0.7(K) 847.5 (K)
Tidally Locked Blackbody T 0.1(K) 1326.5 (K)
Tidally Locked Blackbody T 0.3(K) 1245.7 (K)
Size Class: 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-3
Alternate Name :
Star Distance(LY) : 449.3
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 1.6 (GY)
Temperature : 5224 (K)
Spectral type : K
Metalicity : 0.4
Absolute Magnitude: 6.2
Apparent Magnitude: 11.9
Right Ascension(RA) 206.0941
Declination (DEC) 48.0286
Hubble Space Telescope Guide Star Catalog (GSC) ID 03466-00819
Discovered by
Discovery Paper - Authors "Tucker Chan1, Mikael Ingemyr1,2,5, Joshua N. Winn1, Matthew J. Holman3, Roberto Sanchis-Ojeda1, Gil Esquerdo3, and Mark Everett"
Discovery Paper - Title "THE TRANSIT LIGHT-CURVE PROJECT. XIV. CONFIRMATION OF ANOMALOUS RADII FOR THE EXOPLANETS TrES-4b, HAT-P-3b, AND WASP-12b"
Discovery Paper - Journal "The Astronomical Journal,olume 141,umber 6"
Discovery Paper - URL http://iopscience.iop.org/article/10.1088/0004-6256/141/6/179/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-3+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HAT-P-3%20b/
HAT-P-3 b
HAT-P-3 b

  • HAT-P-3 b is an exoplanet orbiting the star HAT-P-3, located about 449.3 light-years (137.7 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star HAT-P-3 has apparent magnitude of 11.9, with absolute magnitude of 6.2.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5224 with its spectral types of K
  • In this planetary system, the extrasolar planet HAT-P-3 b orbits around the star HAT-P-3 every 2.9 days with its orbital distance of 0.04 AU ( 5783453.7 km)
  • (Projected orbit of HAT-P-3 b around its host star HAT-P-3)


  • The Star HAT-P-3 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.472 AU ( 70666117.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.653 AU ( 97679041.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.995 AU ( 148841242.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.464 AU ( 219026408.2 km)
  • Radiation at Planetary Boundary of HAT-P-3 b : 390110.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-3)



  • Kopparapu Recent Venus for Star HAT-P-3 distance : 0.505 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-3 distance : 0.640 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-3 distance : 0.618 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-3 distance : 0.678 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-3 distance : 1.150 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-3 distance : 1.213 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-3)



  • Original Kopparapu Recent Venus for Star HAT-P-3 distance : 0.501 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-3 distance : 0.659 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-3 distance : 0.663 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-3 distance : 1.169 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-3 distance : 1.216 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-3)



    (Position in Stellar Map of star HAT-P-3 and its Exoplanet HAT-P-3 b)



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