Imaginary Picture of WASP-42 b
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Exoplanet Name : WASP-42 b
Alternate Name :
Radius (Rjup / Re): 1.0800 (Rjup) 12.1057 (Rearth)
Mass (Mjup / Me): 0.5000 (Mjup) 158.9690 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0458 (AU) 0.0458 (AU Est.)
Eccentricity : 0.0600
Orbital Period(Yrs) 0.0136
Orbital Period(Observed/Estimated) 4.98 (Days Obs.) 3.27 (Days Est.)
Star Radiation at Atmospheric Boundary: 13032.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 476.9 (K)
Blackbody T 0.3(K) 447.8 (K)
Blackbody T 0.7(K) 362.3 (K)
Tidally Locked Blackbody T 0.1(K) 567.1 (K)
Tidally Locked Blackbody T 0.3(K) 532.6 (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-42
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 0.4 (Rsun Estimated)
Stellar Mass(Msun) : 1.2 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
Metalicity : 0.0
Absolute Magnitude: 25.0
Apparent Magnitude: 22.0
Right Ascension(RA) 192.9815
Declination (DEC) -42.0736
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-42&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/WASP-42%20b/
WASP-42 b
WASP-42 b

  • WASP-42 b is an exoplanet orbiting the star WASP-42. Its discovery was publicly announced on 2011.
  • The host star WASP-42 has apparent magnitude of 22.0, with absolute magnitude of 25.0.
  • It is 1.2 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • In this planetary system, the extrasolar planet WASP-42 b orbits around the star WASP-42 every 5.0 days with its orbital distance of 0.05 AU ( 6851582.5 km)
  • (Projected orbit of WASP-42 b around its host star WASP-42)


  • The Star WASP-42 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.102 AU ( 15301294.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.141 AU ( 21150388.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.215 AU ( 32228511.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.317 AU ( 47425666.0 km)
  • Radiation at Planetary Boundary of WASP-42 b : 13032.09 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-42)



  • Kopparapu Recent Venus for Star WASP-42 distance : 0.116 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-42 distance : 0.147 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-42 distance : 0.142 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-42 distance : 0.156 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-42 distance : 0.288 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-42 distance : 0.304 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-42)



  • Original Kopparapu Recent Venus for Star WASP-42 distance : 0.115 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-42 distance : 0.152 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-42 distance : 0.152 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-42 distance : 0.293 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-42 distance : 0.304 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-42)



    (Position in Stellar Map of star WASP-42 and its Exoplanet WASP-42 b)



    (Zoomed position in Stellar Map of star WASP-42 and its Exoplanet WASP-42 b (zoom level 3))