Imaginary Picture of WASP-81 c

Display orbital revolution of WASP-81 c around the hoststar WASP-81
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Exoplanet Name : WASP-81 c
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 56.6000 (Mjup) 17995.2908 (Mearth)
Semi Major Axis / Orbital Distance Calculated 2.4260 (AU) 2.4260 (AU Est.)
Eccentricity : 0.5570
Orbital Period(Yrs) 3.5509
Orbital Period(Observed/Estimated) 1297.00 (Days Obs.) 1328.05 (Days Est.)
Star Radiation at Atmospheric Boundary: 407.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 200.5 (K)
Blackbody T 0.3(K) 188.3 (K)
Blackbody T 0.7(K) 152.3 (K)
Tidally Locked Blackbody T 0.1(K) 238.4 (K)
Tidally Locked Blackbody T 0.3(K) 223.9 (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-81
Alternate Name :
Star Distance(LY) : 1337.2
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5870 (K)
Spectral type : G1
Metalicity : -0.4
Absolute Magnitude: 2.8
Apparent Magnitude: 10.9
Right Ascension(RA) 304.2079
Declination (DEC) 3.2941
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link
WASP-81 c
WASP-81 c

  • WASP-81 c is an exoplanet orbiting the star WASP-81 , located about 1337.2 light-years (410.0 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star WASP-81 has apparent magnitude of 10.9, with absolute magnitude of 2.8.
  • It is 1.1 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 5870 with its spectral types of G1
  • In this planetary system, the extrasolar planet WASP-81 c orbits around the star WASP-81 every 1297.0 days with its orbital distance of 2.43 AU ( 362924434.3 km)
  • (Projected orbit of WASP-81 c around its host star WASP-81 )


  • The Star WASP-81 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.958 AU ( 143271883.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.324 AU ( 198039184.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.017 AU ( 301767891.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.968 AU ( 444064672.4 km)
  • Radiation at Planetary Boundary of WASP-81 c : 407.22 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star WASP-81 )



  • Kopparapu Recent Venus for Star WASP-81 distance : 0.987 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star WASP-81 distance : 1.250 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star WASP-81 distance : 1.207 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star WASP-81 distance : 1.324 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-81 distance : 2.202 AU
  • Kopparapu Outer Boundary for Early Mars for Star WASP-81 distance : 2.323 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star WASP-81 )



  • Original Kopparapu Recent Venus for Star WASP-81 distance : 0.990 AU
  • Original Kopparapu Runaway Greenhouse for Star WASP-81 distance : 1.284 AU
  • Original Kopparapu Moist Greenhouse for Star WASP-81 distance : 1.310 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star WASP-81 distance : 2.241 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star WASP-81 distance : 2.331 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star WASP-81 )



    (Position in Stellar Map of star WASP-81 and its Exoplanet WASP-81 c)



    (Zoomed position in Stellar Map of star WASP-81 and its Exoplanet WASP-81 c (zoom level 3))