Kepler-221
Imaginary Picture of Star Kepler-221
Star Name : Kepler-221
Alternate Name :
Star Distance (LY/pc): 0.0000 (LY) 0.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.8200 (Rsun, estimated)
Stellar Mass (Msun): 0.7200 (Msun/observed) 0.7200 (Msun/estimated)
Spectral type : K0
Metalicity : -0.4130
Absolute Magnitude : 25.00
Apparent Magnitude : 12.41
Right Ascension(RA) : 296.65475
Declination(DEC) : 46.83527
  • The star Kepler-221 has apparent magnitude of 12.4, with absolute magnitude of 25.0.
  • It is 0.7 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5243 with its spectral types of K0
  • Number of Extrasolar Planets : 4
  • Name of the 1 Planet Kepler-221 b radius 0.153000 mass 0.013703 orbital distance 0.037000
  • Name of the 2 Planet Kepler-221 c radius 0.261000 mass 0.022519 orbital distance 0.059000
  • Name of the 3 Planet Kepler-221 d radius 0.244000 mass 0.021151 orbital distance 0.087000
  • Name of the 4 Planet Kepler-221 e radius 0.235000 mass 0.020425 orbital distance 0.130000
    (Illustration of the Kepler-221's Planetary System)



    The Star Kepler-221 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.488 AU ( 73051927.6 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.675 AU ( 100976854.8 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.029 AU ( 153866380.5 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.514 AU ( 226421119.4 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-221)



    Kopparapu's Recent Venus for Star Kepler-221 distance : 0.522 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star Kepler-221 distance : 0.661 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-221 distance : 0.638 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star Kepler-221 distance : 0.700 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star Kepler-221 distance : 1.187 AU
    Kopparapu's Outer Boundary for Early Mars for Star Kepler-221 distance : 1.252 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-221)



  • Original Kopparapu Recent Venus for Star Kepler-221 distance : 0.518 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-221 distance : 0.680 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-221 distance : 0.685 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-221 distance : 1.207 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-221 distance : 1.255 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-221)



    (Position in Stellar Map of star Kepler-221 )



    (Zoomed position in Stellar Map of star Kepler-221 (zoom level 3))