K2-121

Display orbital revolution around the star K2-121
Imaginary Picture of Star K2-121
Star Name : K2-121
Alternate Name : "EPIC 211818569, 2MASS J08274481+1734457, WISE J082744.80+173445.6"
Star Distance (LY/pc): 555.1969 (LY) 170.2244 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.6800 (Rsun, estimated)
Stellar Mass (Msun): 0.7200 (Msun/observed) 0.7200 (Msun/estimated)
Spectral type : K5V
Metalicity : -0.0400
Absolute Magnitude : 5.15
Apparent Magnitude : 11.31
Right Ascension(RA) : 126.93673
Declination(DEC) : 17.57940
  • This is the K2-121 . The star K2-121 islocated about 555.2 light-years (170.2 pc) away from our Solar System.
  • The star K2-121 has apparent magnitude of 11.3, with absolute magnitude of 5.2.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4551 with its spectral types of K5V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet K2-121 b radius 0.669000 mass 0.277933 orbital distance 0.052500
    (Illustration of the K2-121's Planetary System)



    The Star K2-121 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.305 AU ( 45643684.6 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.422 AU ( 63091500.3 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.643 AU ( 96137484.3 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.946 AU ( 141470519.7 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-121)



    Kopparapu's Recent Venus for Star K2-121 distance : 0.336 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-121 distance : 0.426 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-121 distance : 0.411 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-121 distance : 0.451 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-121 distance : 0.787 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-121 distance : 0.830 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-121)



  • Original Kopparapu Recent Venus for Star K2-121 distance : 0.332 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-121 distance : 0.440 AU
  • Original Kopparapu Moist Greenhouse for Star K2-121 distance : 0.439 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-121 distance : 0.800 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-121 distance : 0.832 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-121)



    (Position in Stellar Map of star K2-121 )



    (Zoomed position in Stellar Map of star K2-121 (zoom level 3))

    (Synthetic Spectrum of star Kepler-844*)
    *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