Imaginary Picture of HAT-P-40 b

Display orbital revolution of HAT-P-40 b around the hoststar HAT-P-40
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Exoplanet Name : HAT-P-40 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.7300 (Rjup) 19.3916 (Rearth)
Mass (Mjup / Me): 0.6150 (Mjup) 195.5319 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0608 (AU) 0.0608 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0122
Orbital Period(Observed/Estimated) 4.46 (Days Obs.) 4.45 (Days Est.)
Surface Gravity (G Earth) 0.5200
Star Radiation at Atmospheric Boundary: 2206088.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1720.1 (K)
Blackbody T 0.3(K) 1615.3 (K)
Blackbody T 0.7(K) 1307.0 (K)
Tidally Locked Blackbody T 0.1(K) 2045.5 (K)
Tidally Locked Blackbody T 0.3(K) 1921.0 (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-40
Alternate Name :
Star Distance(LY) : 1411.9
Stellar Radius(Rsun) : 2.2 (Rsun Measured)
Stellar Mass(Msun) : 1.5 (Msun Measured) 1.5 (Msun Estimated)
Star Age : 2.7 (GY)
Temperature : 6080 (K)
Spectral type : G0
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.2
Absolute Magnitude: 3.5
Apparent Magnitude: 11.7
Right Ascension(RA) 335.5129
Declination (DEC) 45.4575
Hubble Space Telescope Guide Star Catalog (GSC) ID 03607-01028
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-40+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HAT-P-40%20b/
HAT-P-40 b
HAT-P-40 b

  • HAT-P-40 b is an exoplanet orbiting the star HAT-P-40, located about 1411.9 light-years (432.9 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star HAT-P-40 has apparent magnitude of 11.7, with absolute magnitude of 3.5.
  • It is 1.5 times more massive and 2.2 times bigger compared with our Sun. The surface temperature is 6080 with its spectral types of G0
  • In this planetary system, the extrasolar planet HAT-P-40 b orbits around the star HAT-P-40 every 4.5 days with its orbital distance of 0.06 AU ( 9095550.5 km)
  • (Projected orbit of HAT-P-40 b around its host star HAT-P-40)


  • The Star HAT-P-40 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.767 AU ( 264283943.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.442 AU ( 365309476.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.721 AU ( 556650798.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.476 AU ( 819136035.7 km)
  • Radiation at Planetary Boundary of HAT-P-40 b : 2206088.78 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-40)



  • Kopparapu Recent Venus for Star HAT-P-40 distance : 1.798 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-40 distance : 2.277 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-40 distance : 2.199 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-40 distance : 2.410 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-40 distance : 3.991 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-40 distance : 4.210 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-40)



  • Original Kopparapu Recent Venus for Star HAT-P-40 distance : 1.811 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-40 distance : 2.337 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-40 distance : 2.397 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-40 distance : 4.062 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-40 distance : 4.225 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-40)



    (Position in Stellar Map of star HAT-P-40 and its Exoplanet HAT-P-40 b)



    (Zoomed position in Stellar Map of star HAT-P-40 and its Exoplanet HAT-P-40 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-40*)
    *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