Imaginary Picture of WASP-128 b

Display orbital revolution of WASP-128 b around the hoststar WASP-128
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Exoplanet Name : WASP-128 b
Alternate Name :
Radius (Rjup / Re): 0.9370 (Rjup) 10.5028 (Rearth)
Mass (Mjup / Me): 37.1900 (Mjup) 11824.1142 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0359 (AU) 0.0359 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0060
Orbital Period(Observed/Estimated) 2.21 (Days Obs.) 2.31 (Days Est.)
Surface Gravity (G Earth) 107.1904
Star Radiation at Atmospheric Boundary: 1582664.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1583.0 (K)
Blackbody T 0.3(K) 1486.6 (K)
Blackbody T 0.7(K) 1202.8 (K)
Tidally Locked Blackbody T 0.1(K) 1882.6 (K)
Tidally Locked Blackbody T 0.3(K) 1767.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : WASP-128
Alternate Name : 2MASS J11312609-4141222
Star Distance(LY) : 1375.6
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 2.2 (GY)
Temperature : 5950 (K)
Spectral type : G0V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 4.4
Apparent Magnitude: 12.5
Right Ascension(RA) 172.8587
Declination (DEC) -41.6895
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-128+&submit=SIMBAD+search
Open Exoplanet Database Link
WASP-128 b
WASP-128 b

  • WASP-128 b is an exoplanet orbiting the star WASP-128, located about 1375.6 light-years (421.8 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star WASP-128 has apparent magnitude of 12.5, with absolute magnitude of 4.4.
  • It is 1.2 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 5950 with its spectral types of G0V
  • In this planetary system, the extrasolar planet WASP-128 b orbits around the star WASP-128 every 2.2 days with its orbital distance of 0.04 AU ( 5370563.6 km)
  • (Projected orbit of WASP-128 b around its host star WASP-128)


  • The Star WASP-128 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.884 AU ( 132173540.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.221 AU ( 182698373.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.861 AU ( 278391890.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.738 AU ( 409665862.7 km)
  • Radiation at Planetary Boundary of WASP-128 b : 1582664.04 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-128)



  • Kopparapu Recent Venus for Star WASP-128 distance : 0.906 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-128 distance : 1.148 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-128 distance : 1.108 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-128 distance : 1.215 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-128 distance : 2.018 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-128 distance : 2.128 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-128)



  • Original Kopparapu Recent Venus for Star WASP-128 distance : 0.911 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-128 distance : 1.179 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-128 distance : 1.205 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-128 distance : 2.054 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-128 distance : 2.136 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-128)



    (Position in Stellar Map of star WASP-128 and its Exoplanet WASP-128 b)



    (Zoomed position in Stellar Map of star WASP-128 and its Exoplanet WASP-128 b (zoom level 3))

    (Synthetic Spectrum of star WASP-128*)
    *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