81 Cet

Display orbital revolution around the star 81 Cet
Imaginary Picture of Star 81 Cet
Star Name : 81 Cet
Alternate Name :
Star Distance (LY/pc): 301.7169 (LY) 92.5069 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 11.0000 (Rsun, estimated)
Stellar Mass (Msun): 2.4000 (Msun/observed) 2.4000 (Msun/estimated)
Spectral type : G5III
Metalicity : -0.0600
Absolute Magnitude : 0.82
Apparent Magnitude : 5.65
Right Ascension(RA) : 39.42500
Declination(DEC) : -3.39611
  • This is the 81 Cet . The star 81 Cet islocated about 301.7 light-years (92.5 pc) away from our Solar System.
  • The star 81 Cet has apparent magnitude of 5.7, with absolute magnitude of 0.8.
  • It is 2.4 times more massive and 11.0 times bigger compared with our Sun. The surface temperature is 5660 with its spectral types of G5III
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet 81 Cet b radius 1.049871 mass 5.300000 orbital distance 2.500000
    (Illustration of the 81 Cet's Planetary System)



    The Star 81 Cet 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 7.634 AU ( 1142046165.6 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 10.552 AU ( 1578606253.2 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 16.079 AU ( 2405446585.0 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 23.662 AU ( 3539720025.7 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 81 Cet)



    Kopparapu's Recent Venus for Star 81 Cet distance : 7.968 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star 81 Cet distance : 10.090 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star 81 Cet distance : 9.745 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star 81 Cet distance : 10.686 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star 81 Cet distance : 17.877 AU
    Kopparapu's Outer Boundary for Early Mars for Star 81 Cet distance : 18.856 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star 81 Cet)



  • Original Kopparapu Recent Venus for Star 81 Cet distance : 7.960 AU
  • Original Kopparapu Runaway Greenhouse for Star 81 Cet distance : 10.373 AU
  • Original Kopparapu Moist Greenhouse for Star 81 Cet distance : 10.533 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 81 Cet distance : 18.189 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star 81 Cet distance : 18.916 AU

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



    (Position in Stellar Map of star 81 Cet )



    (Zoomed position in Stellar Map of star 81 Cet (zoom level 3))

    (Synthetic Spectrum of star *)
    *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