Imaginary Picture of HATS-31 b

Display orbital revolution of HATS-31 b around the hoststar HATS-31
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Exoplanet Name : HATS-31 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.6400 (Rjup) 18.3828 (Rearth)
Mass (Mjup / Me): 0.8800 (Mjup) 279.7854 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0478 (AU) 0.0478 (AU Est.)
Eccentricity : 0.2330
Orbital Period(Yrs) 0.0092
Orbital Period(Observed/Estimated) 3.38 (Days Obs.) 3.38 (Days Est.)
Surface Gravity (G Earth) 0.8279
Star Radiation at Atmospheric Boundary: 2514512.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1777.3 (K)
Blackbody T 0.3(K) 1669.1 (K)
Blackbody T 0.7(K) 1350.4 (K)
Tidally Locked Blackbody T 0.1(K) 2113.6 (K)
Tidally Locked Blackbody T 0.3(K) 1984.8 (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 : HATS-31
Alternate Name :
Star Distance(LY) : 2844.1
Stellar Radius(Rsun) : 1.9 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 4.3 (GY)
Temperature : 6050 (K)
Spectral type : G0
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.4
Apparent Magnitude: 13.1
Right Ascension(RA) 191.7028
Declination (DEC) -24.4275
Hubble Space Telescope Guide Star Catalog (GSC) ID 06688-00298
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=HATS-31&submit=SIMBAD+search
Open Exoplanet Database Link
HATS-31 b
HATS-31 b

  • HATS-31 b is an exoplanet orbiting the star HATS-31, located about 2844.1 light-years (872.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star HATS-31 has apparent magnitude of 13.1, with absolute magnitude of 3.4.
  • It is 1.3 times more massive and 1.9 times bigger compared with our Sun. The surface temperature is 6050 with its spectral types of G0
  • In this planetary system, the extrasolar planet HATS-31 b orbits around the star HATS-31 every 3.4 days with its orbital distance of 0.05 AU ( 7150778.2 km)
  • (Projected orbit of HATS-31 b around its host star HATS-31)


  • The Star HATS-31 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.483 AU ( 221824988.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.050 AU ( 306620104.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.123 AU ( 467221184.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.596 AU ( 687536440.1 km)
  • Radiation at Planetary Boundary of HATS-31 b : 2514512.10 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HATS-31)



  • Kopparapu Recent Venus for Star HATS-31 distance : 1.512 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HATS-31 distance : 1.914 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HATS-31 distance : 1.849 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HATS-31 distance : 2.026 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-31 distance : 3.358 AU
  • Kopparapu Outer Boundary for Early Mars for Star HATS-31 distance : 3.542 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HATS-31)



  • Original Kopparapu Recent Venus for Star HATS-31 distance : 1.522 AU
  • Original Kopparapu Runaway Greenhouse for Star HATS-31 distance : 1.965 AU
  • Original Kopparapu Moist Greenhouse for Star HATS-31 distance : 2.014 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HATS-31 distance : 3.418 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HATS-31 distance : 3.555 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HATS-31)



    (Position in Stellar Map of star HATS-31 and its Exoplanet HATS-31 b)



    (Zoomed position in Stellar Map of star HATS-31 and its Exoplanet HATS-31 b (zoom level 3))

    (Synthetic Spectrum of star HATS-31*)
    *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