Imaginary Picture of WASP-2 A b

Display orbital revolution of WASP-2 A b around the hoststar WASP-2 A
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Exoplanet Name : WASP-2 A b
Alternate Name : WASP-2 b
Status : Confirmed
Radius (Rjup / Re): 1.0790 (Rjup) 12.0945 (Rearth)
Mass (Mjup / Me): 0.8470 (Mjup) 269.2935 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0314 (AU) 0.0314 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0059
Orbital Period(Observed/Estimated) 2.15 (Days Obs.) 2.22 (Days Est.)
Surface Gravity (G Earth) 1.8410
Star Radiation at Atmospheric Boundary: 609340.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1247.0 (K)
Blackbody T 0.3(K) 1171.0 (K)
Blackbody T 0.7(K) 947.5 (K)
Tidally Locked Blackbody T 0.1(K) 1482.9 (K)
Tidally Locked Blackbody T 0.3(K) 1392.6 (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-2 A
Alternate Name : WASP-2
Star Distance(LY) : 469.7
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5150 (K)
Spectral type : K1V
UV portion[%]: 4.4
Visible portion[%]: 39.4
IR portion[%]: 56.2
Metalicity : -0.1
Absolute Magnitude: 6.2
Apparent Magnitude: 12.0
Right Ascension(RA) 307.7255
Declination (DEC) 6.4294
Hubble Space Telescope Guide Star Catalog (GSC) ID 00522-01199
Discovered by
Discovery Paper - Authors S. Daemgen - F. Hormuth - W. Brandner - C. Bergfors - M. Janson - S. Hippler - T. Henning
Discovery Paper - Title Binarity of transit host stars[*]Implications for planetary parameters
Discovery Paper - Journal "A&A Volume 498, Number 2, May I 2009 Page(s) 567 - 574 Section Planets and planetary systems DOI https://doi.org/10.1051/0004-6361/200810988"
Discovery Paper - URL https://www.aanda.org/articles/aa/full_html/2009/17/aa10988-08/aa10988-08.html ..
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-2+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/WASP-2%20A%20b/
WASP-2 A b
WASP-2 A b

  • WASP-2 A b is an exoplanet orbiting the star WASP-2 A, located about 469.7 light-years (144.0 pc) away from Solar System. Its discovery was publicly announced on 2006.
  • The host star WASP-2 A has apparent magnitude of 12.0, with absolute magnitude of 6.2.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5150 with its spectral types of K1V
  • In this planetary system, the extrasolar planet WASP-2 A b orbits around the star WASP-2 A every 2.2 days with its orbital distance of 0.03 AU ( 4694381.2 km)
  • (Projected orbit of WASP-2 A b around its host star WASP-2 A)


  • The Star WASP-2 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.479 AU ( 71686705.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.662 AU ( 99089760.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.009 AU ( 150990866.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.485 AU ( 222189675.2 km)
  • Radiation at Planetary Boundary of WASP-2 A b : 609340.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-2 A)



  • Kopparapu Recent Venus for Star WASP-2 A distance : 0.515 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-2 A distance : 0.651 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-2 A distance : 0.629 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-2 A distance : 0.690 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-2 A distance : 1.174 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-2 A distance : 1.238 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-2 A)



  • Original Kopparapu Recent Venus for Star WASP-2 A distance : 0.510 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-2 A distance : 0.671 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-2 A distance : 0.675 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-2 A distance : 1.194 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-2 A distance : 1.242 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-2 A)



    (Position in Stellar Map of star WASP-2 A and its Exoplanet WASP-2 A b)



    (Zoomed position in Stellar Map of star WASP-2 A and its Exoplanet WASP-2 A b (zoom level 3))

    (Synthetic Spectrum of star WASP-2 A*)
    *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