Imaginary Picture of WASP-31 b

Display orbital revolution of WASP-31 b around the hoststar WASP-31
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Exoplanet Name : WASP-31 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.5370 (Rjup) 17.2282 (Rearth)
Mass (Mjup / Me): 0.4780 (Mjup) 151.9744 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0466 (AU) 0.0466 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0093
Orbital Period(Observed/Estimated) 3.41 (Days Obs.) 3.41 (Days Est.)
Surface Gravity (G Earth) 0.5120
Star Radiation at Atmospheric Boundary: 1284702.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1502.6 (K)
Blackbody T 0.3(K) 1411.1 (K)
Blackbody T 0.7(K) 1141.7 (K)
Tidally Locked Blackbody T 0.1(K) 1786.9 (K)
Tidally Locked Blackbody T 0.3(K) 1678.1 (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 : WASP-31
Alternate Name :
Star Distance(LY) : 1304.6
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6200 (K)
Spectral type : F
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : -0.2
Absolute Magnitude: 3.7
Apparent Magnitude: 11.7
Right Ascension(RA) 169.4390
Declination (DEC) -19.0547
Hubble Space Telescope Guide Star Catalog (GSC) ID 06087-01053
Discovered by
Discovery Paper - Authors CUTRI R.M.; SKRUTSKIE M.F.; VAN DYK S.; BEICHMAN C.A.; CARPENTER J.M.; CHESTER T.; CAMBRESY L.; EVANS T.; FOWLER J.; GIZIS J.; HOWARD E.; HUCHRA J.; JARRETT T.; KOPAN E.L.; KIRKPATRICK J.D.; LIGHT R.M.; MARSH K.A.; McCALLON H.; SCHNEIDER S.; STIENING R.;
Discovery Paper - Title 2MASS All Sky Catalog of point sources.
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-31+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/WASP-31%20b/
WASP-31 b
WASP-31 b

  • WASP-31 b is an exoplanet orbiting the star WASP-31, located about 1304.6 light-years (400.0 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star WASP-31 has apparent magnitude of 11.7, with absolute magnitude of 3.7.
  • It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6200 with its spectral types of F
  • In this planetary system, the extrasolar planet WASP-31 b orbits around the star WASP-31 every 3.4 days with its orbital distance of 0.05 AU ( 6966772.8 km)
  • (Projected orbit of WASP-31 b around its host star WASP-31)


  • The Star WASP-31 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.033 AU ( 154476768.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.427 AU ( 213527264.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.175 AU ( 325368296.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.201 AU ( 478793702.4 km)
  • Radiation at Planetary Boundary of WASP-31 b : 1284702.19 W/m2

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



  • Kopparapu Recent Venus for Star WASP-31 distance : 1.043 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-31 distance : 1.321 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-31 distance : 1.276 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-31 distance : 1.398 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-31 distance : 2.310 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-31 distance : 2.437 AU

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



  • Original Kopparapu Recent Venus for Star WASP-31 distance : 1.054 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-31 distance : 1.356 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-31 distance : 1.394 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-31 distance : 2.352 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-31 distance : 2.446 AU

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



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



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

    (Synthetic Spectrum of star WASP-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