Kepler-121

Display orbital revolution around the star Kepler-121
Imaginary Picture of Star Kepler-121
Star Name : Kepler-121
Alternate Name : "2MASS J19043889+3940407, KIC 4545187, KOI-223, WISE J190438.90+394040.9"
Star Distance (LY/pc): 1689.7816 (LY) 518.0900 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.7000 (Rsun, estimated)
Stellar Mass (Msun): 0.0000 (Msun/observed) 0.7917 (Msun/estimated)
Spectral type : K0
Metalicity : -0.3800
Absolute Magnitude : 4.75
Apparent Magnitude : 13.32
Right Ascension(RA) : 286.16206
Declination(DEC) : 39.67800
  • This is the Kepler-121 . The star Kepler-121 islocated about 1689.8 light-years (518.1 pc) away from our Solar System.
  • The star Kepler-121 has apparent magnitude of 13.3, with absolute magnitude of 4.7.
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet Kepler-121 b radius 0.209000 mass 0.018315 orbital distance 0.039000
  • Name of the 2 Planet Kepler-121 c radius 0.203000 mass 0.017825 orbital distance 0.216000
    (Illustration of the Kepler-121's Planetary System)



    The Star Kepler-121 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.428 AU ( 63989505.7 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.591 AU ( 88450219.3 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.901 AU ( 134778560.3 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.326 AU ( 198332555.7 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-121)



    Kopparapu's Recent Venus for Star Kepler-121 distance : 0.455 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star Kepler-121 distance : 0.577 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-121 distance : 0.557 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star Kepler-121 distance : 0.611 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star Kepler-121 distance : 1.033 AU
    Kopparapu's Outer Boundary for Early Mars for Star Kepler-121 distance : 1.090 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-121)



  • Original Kopparapu Recent Venus for Star Kepler-121 distance : 0.452 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-121 distance : 0.594 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-121 distance : 0.599 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-121 distance : 1.051 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-121 distance : 1.093 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-121)



    (Position in Stellar Map of star Kepler-121 )



    (Zoomed position in Stellar Map of star Kepler-121 (zoom level 3))

    (Synthetic Spectrum of star HIP 75458*)
    *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