Imaginary Picture of WASP-47 b

Display orbital revolution of WASP-47 b around the hoststar WASP-47
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Exoplanet Name : WASP-47 b
Alternate Name : "1SWASP J220448.72-120107.8 b, 2MASS J22044873-1201079 b, EPIC 206103150.01, K2-23 b, WISE J220448.74-120108.4 b"
Radius (Rjup / Re): 1.1270 (Rjup) 12.6325 (Rearth)
Mass (Mjup / Me): 1.1424 (Mjup) 363.2219 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0520 (AU) 0.0520 (AU Est.)
Eccentricity : 0.0028
Orbital Period(Yrs) 0.0114
Orbital Period(Observed/Estimated) 4.16 (Days Obs.) 4.25 (Days Est.)
Surface Gravity (G Earth) 2.2761
Star Radiation at Atmospheric Boundary: 560022.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1220.9 (K)
Blackbody T 0.3(K) 1146.6 (K)
Blackbody T 0.7(K) 927.7 (K)
Tidally Locked Blackbody T 0.1(K) 1451.9 (K)
Tidally Locked Blackbody T 0.3(K) 1363.5 (K)
Size Class: 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 : WASP-47
Alternate Name : "1SWASP J220448.72-120107.8, 2MASS J22044873-1201079, EPIC 206103150, K2-23, WISE J220448.74-120108.4"
Star Distance(LY) : 869.8
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5552 (K)
Spectral type : G9V
UV portion[%]: 7.1
Visible portion[%]: 43.6
IR portion[%]: 49.3
Metalicity : 0.4
Absolute Magnitude: 4.8
Apparent Magnitude: 11.9
Right Ascension(RA) 331.1197
Declination (DEC) -12.0189
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-47&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/WASP-47%20b/
WASP-47 b
WASP-47 b

  • WASP-47 b is an exoplanet orbiting the star WASP-47, located about 869.8 light-years (266.7 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star WASP-47 has apparent magnitude of 11.9, with absolute magnitude of 4.8.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5552 with its spectral types of G9V
  • In this planetary system, the extrasolar planet WASP-47 b orbits around the star WASP-47 every 4.2 days with its orbital distance of 0.05 AU ( 7779089.3 km)
  • (Projected orbit of WASP-47 b around its host star WASP-47)


  • The Star WASP-47 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.761 AU ( 113883781.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.052 AU ( 157417147.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.603 AU ( 239868895.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.360 AU ( 352977588.3 km)
  • Radiation at Planetary Boundary of WASP-47 b : 560022.73 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-47)



  • Kopparapu Recent Venus for Star WASP-47 distance : 0.800 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-47 distance : 1.013 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-47 distance : 0.978 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-47 distance : 1.072 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-47 distance : 1.800 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-47 distance : 1.898 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-47)



  • Original Kopparapu Recent Venus for Star WASP-47 distance : 0.797 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-47 distance : 1.041 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-47 distance : 1.055 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-47 distance : 1.831 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-47 distance : 1.904 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-47)



    (Position in Stellar Map of star WASP-47 and its Exoplanet WASP-47 b)



    (Zoomed position in Stellar Map of star WASP-47 and its Exoplanet WASP-47 b (zoom level 3))

    (Synthetic Spectrum of star WASP-47*)
    *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