Kepler-821

Display orbital revolution around the star Kepler-821
Imaginary Picture of Star Kepler-821
Star Name : Kepler-821
Alternate Name : "2MASS J19022818+3922463, KIC 4243911, KOI-1337, WISE J190228.18+392246.1"
Star Distance (LY/pc): 2018.9056 (LY) 619.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.8000 (Rsun, estimated)
Stellar Mass (Msun): 0.8400 (Msun/observed) 0.8400 (Msun/estimated)
Spectral type : K0
Metalicity : -0.0300
Absolute Magnitude : 4.48
Apparent Magnitude : 13.44
Right Ascension(RA) : 285.61744
Declination(DEC) : 39.37953
  • This is the Kepler-821 . The star Kepler-821 islocated about 2018.9 light-years (619.0 pc) away from our Solar System.
  • The star Kepler-821 has apparent magnitude of 13.4, with absolute magnitude of 4.5.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5191 with its spectral types of K0
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet Kepler-821 b radius 0.117000 mass 0.008191 orbital distance 0.000000
    (Illustration of the Kepler-821's Planetary System)



    The Star Kepler-821 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.467 AU ( 69863470.8 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.646 AU ( 96569574.1 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.984 AU ( 147150660.1 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.447 AU ( 216538642.6 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-821)



    Kopparapu's Recent Venus for Star Kepler-821 distance : 0.500 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star Kepler-821 distance : 0.634 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-821 distance : 0.612 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star Kepler-821 distance : 0.671 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star Kepler-821 distance : 1.140 AU
    Kopparapu's Outer Boundary for Early Mars for Star Kepler-821 distance : 1.202 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-821)



  • Original Kopparapu Recent Venus for Star Kepler-821 distance : 0.496 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-821 distance : 0.652 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-821 distance : 0.657 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-821 distance : 1.159 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-821 distance : 1.206 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-821)



    (Position in Stellar Map of star Kepler-821 )



    (Zoomed position in Stellar Map of star Kepler-821 (zoom level 3))

    (Synthetic Spectrum of star Kepler-217*)
    *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