Imaginary Picture of WASP-8 b

Display orbital revolution of WASP-8 b around the hoststar WASP-8
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Exoplanet Name : WASP-8 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0380 (Rjup) 11.6349 (Rearth)
Mass (Mjup / Me): 2.2440 (Mjup) 713.4529 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0801 (AU) 0.0801 (AU Est.)
Eccentricity : 0.3100
Orbital Period(Yrs) 0.0223
Orbital Period(Observed/Estimated) 8.16 (Days Obs.) 8.15 (Days Est.)
Surface Gravity (G Earth) 5.2703
Star Radiation at Atmospheric Boundary: 170717.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 907.2 (K)
Blackbody T 0.3(K) 852.0 (K)
Blackbody T 0.7(K) 689.3 (K)
Tidally Locked Blackbody T 0.1(K) 1078.9 (K)
Tidally Locked Blackbody T 0.3(K) 1013.2 (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 : WASP-8
Alternate Name :
Star Distance(LY) : 291.2
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.0 (GY)
Temperature : 5600 (K)
Spectral type : G6
UV portion[%]: 7.3
Visible portion[%]: 43.9
IR portion[%]: 48.8
Metalicity : 0.2
Absolute Magnitude: 5.1
Apparent Magnitude: 9.9
Right Ascension(RA) 359.9003
Declination (DEC) -35.0314
Hubble Space Telescope Guide Star Catalog (GSC) ID
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-8+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/WASP-8%20b/
WASP-8 b
WASP-8 b

  • WASP-8 b is an exoplanet orbiting the star WASP-8, located about 291.2 light-years (89.3 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star WASP-8 has apparent magnitude of 9.9, with absolute magnitude of 5.1.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5600 with its spectral types of G6
  • In this planetary system, the extrasolar planet WASP-8 b orbits around the star WASP-8 every 8.2 days with its orbital distance of 0.08 AU ( 11982789.4 km)
  • (Projected orbit of WASP-8 b around its host star WASP-8)


  • The Star WASP-8 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.647 AU ( 96856119.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.895 AU ( 133880469.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.364 AU ( 204004207.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.007 AU ( 300201128.1 km)
  • Radiation at Planetary Boundary of WASP-8 b : 170717.36 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-8)



  • Kopparapu Recent Venus for Star WASP-8 distance : 0.678 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-8 distance : 0.859 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-8 distance : 0.829 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-8 distance : 0.910 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-8 distance : 1.524 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-8 distance : 1.608 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-8)



  • Original Kopparapu Recent Venus for Star WASP-8 distance : 0.677 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-8 distance : 0.883 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-8 distance : 0.895 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-8 distance : 1.551 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-8 distance : 1.613 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-8)



    (Position in Stellar Map of star WASP-8 and its Exoplanet WASP-8 b)



    (Zoomed position in Stellar Map of star WASP-8 and its Exoplanet WASP-8 b (zoom level 3))

    (Synthetic Spectrum of star WASP-8*)
    *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