Kepler-81
Imaginary Picture of Star Kepler-81
Star Name : Kepler-81
Alternate Name :
Star Distance (LY/pc): 0.0000 (LY) 0.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.5780 (Rsun, estimated)
Stellar Mass (Msun): 0.6480 (Msun/observed) 0.6480 (Msun/estimated)
Spectral type : K5
Metalicity : -0.2000
Absolute Magnitude : 25.00
Apparent Magnitude : 15.56
Right Ascension(RA) : 293.63696
Declination(DEC) : 42.82497
  • The star Kepler-81 has apparent magnitude of 15.6, with absolute magnitude of 25.0.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4391 with its spectral types of K5
  • Number of Extrasolar Planets : 3
  • Name of the 1 Planet Kepler-81 b radius 0.226900 mass 0.019769 orbital distance 0.056000
  • Name of the 2 Planet Kepler-81 c radius 0.218800 mass 0.019112 orbital distance 0.089000
  • Name of the 3 Planet Kepler-81 d radius 0.108000 mass 0.006124 orbital distance 0.128000
    (Illustration of the Kepler-81's Planetary System)



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

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.241 AU ( 36117096.1 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.334 AU ( 49923265.4 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.509 AU ( 76072008.4 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.748 AU ( 111943292.9 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-81)



    Kopparapu's Recent Venus for Star Kepler-81 distance : 0.268 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star Kepler-81 distance : 0.339 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-81 distance : 0.327 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star Kepler-81 distance : 0.359 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star Kepler-81 distance : 0.631 AU
    Kopparapu's Outer Boundary for Early Mars for Star Kepler-81 distance : 0.665 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-81)



  • Original Kopparapu Recent Venus for Star Kepler-81 distance : 0.264 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-81 distance : 0.350 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-81 distance : 0.349 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-81 distance : 0.641 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-81 distance : 0.667 AU

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



    (Position in Stellar Map of star Kepler-81 )



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