Imaginary Picture of WASP-181 b

Display orbital revolution of WASP-181 b around the hoststar WASP-181
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Exoplanet Name : WASP-181 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.1840 (Rjup) 13.2715 (Rearth)
Mass (Mjup / Me): 0.2990 (Mjup) 95.0635 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0543 (AU) 0.0543 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0124
Orbital Period(Observed/Estimated) 4.52 (Days Obs.) 4.53 (Days Est.)
Surface Gravity (G Earth) 0.5397
Star Radiation at Atmospheric Boundary: 450706.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1156.4 (K)
Blackbody T 0.3(K) 1086.0 (K)
Blackbody T 0.7(K) 878.7 (K)
Tidally Locked Blackbody T 0.1(K) 1375.2 (K)
Tidally Locked Blackbody T 0.3(K) 1291.5 (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-181
Alternate Name :
Star Distance(LY) : 1444.9
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 2.5 (GY)
Temperature : 5839 (K)
Spectral type : G2
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.1
Absolute Magnitude: 1.8
Apparent Magnitude: 10.0
Right Ascension(RA) 26.7917
Declination (DEC) 3.1331
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
WASP-181 b
WASP-181 b

  • WASP-181 b is an exoplanet orbiting the star WASP-181, located about 1444.9 light-years (443.0 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star WASP-181 has apparent magnitude of 10.0, with absolute magnitude of 1.8.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5839 with its spectral types of G2
  • In this planetary system, the extrasolar planet WASP-181 b orbits around the star WASP-181 every 4.5 days with its orbital distance of 0.05 AU ( 8118676.4 km)
  • (Projected orbit of WASP-181 b around its host star WASP-181)


  • The Star WASP-181 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.713 AU ( 106625818.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.985 AU ( 147384745.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.501 AU ( 224581735.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.209 AU ( 330481862.2 km)
  • Radiation at Planetary Boundary of WASP-181 b : 450706.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-181)



  • Kopparapu Recent Venus for Star WASP-181 distance : 0.736 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-181 distance : 0.932 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-181 distance : 0.900 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-181 distance : 0.987 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-181 distance : 1.643 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-181 distance : 1.733 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-181)



  • Original Kopparapu Recent Venus for Star WASP-181 distance : 0.738 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-181 distance : 0.958 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-181 distance : 0.976 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-181 distance : 1.672 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-181 distance : 1.739 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-181)



    (Position in Stellar Map of star WASP-181 and its Exoplanet WASP-181 b)



    (Zoomed position in Stellar Map of star WASP-181 and its Exoplanet WASP-181 b (zoom level 3))

    (Synthetic Spectrum of star WASP-181*)
    *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