Imaginary Picture of HAT-P-27 b
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Exoplanet Name : HAT-P-27 b
Alternate Name : WASP-40 b
Radius (Rjup / Re): 1.0550 (Rjup) 11.8255 (Rearth)
Mass (Mjup / Me): 0.6600 (Mjup) 209.8391 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0403 (AU) 0.0403 (AU Est.)
Eccentricity : 0.0780
Orbital Period(Yrs) 0.0083
Orbital Period(Observed/Estimated) 3.04 (Days Obs.) 3.04 (Days Est.)
Star Radiation at Atmospheric Boundary: 480453.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1175.0 (K)
Blackbody T 0.3(K) 1103.5 (K)
Blackbody T 0.7(K) 892.8 (K)
Tidally Locked Blackbody T 0.1(K) 1397.4 (K)
Tidally Locked Blackbody T 0.3(K) 1312.3 (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-27
Alternate Name : WASP-40
Star Distance(LY) : 653.3
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.4 (GY)
Temperature : 5300 (K)
Spectral type : G8
Metalicity : 0.3
Absolute Magnitude: 5.7
Apparent Magnitude: 12.2
Right Ascension(RA) 222.7674
Declination (DEC) 5.9472
Hubble Space Telescope Guide Star Catalog (GSC) ID 00333-00351
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=HAT-P-27+&submit=SIMBAD+search
Open Exoplanet Database Link
HAT-P-27 b
HAT-P-27 b

  • HAT-P-27 b is an exoplanet orbiting the star HAT-P-27, located about 653.3 light-years (200.3 pc) away from Solar System. Its discovery was publicly announced on 2011.
  • The host star HAT-P-27 has apparent magnitude of 12.2, with absolute magnitude of 5.7.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5300 with its spectral types of G8
  • In this planetary system, the extrasolar planet HAT-P-27 b orbits around the star HAT-P-27 every 3.0 days with its orbital distance of 0.04 AU ( 6028794.2 km)
  • (Projected orbit of HAT-P-27 b around its host star HAT-P-27)


  • The Star HAT-P-27 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.546 AU ( 81749703.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.755 AU ( 112999454.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.151 AU ( 172186162.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.694 AU ( 253379480.4 km)
  • Radiation at Planetary Boundary of HAT-P-27 b : 480452.96 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-27)



  • Kopparapu Recent Venus for Star HAT-P-27 distance : 0.582 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-27 distance : 0.737 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-27 distance : 0.712 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-27 distance : 0.781 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-27 distance : 1.321 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-27 distance : 1.393 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-27)



  • Original Kopparapu Recent Venus for Star HAT-P-27 distance : 0.578 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-27 distance : 0.759 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-27 distance : 0.765 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-27 distance : 1.344 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-27 distance : 1.397 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-27)



    (Position in Stellar Map of star HAT-P-27 and its Exoplanet HAT-P-27 b)



    (Zoomed position in Stellar Map of star HAT-P-27 and its Exoplanet HAT-P-27 b (zoom level 3))