K2-4

Display orbital revolution around the star K2-4
Imaginary Picture of Star K2-4
Star Name : K2-4
Alternate Name : "EPIC 201208431, 2MASS J11385895-0354202, WISE J113858.93-035420.0"
Star Distance (LY/pc): 761.8153 (LY) 233.5739 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.5700 (Rsun, estimated)
Stellar Mass (Msun): 0.6400 (Msun/observed) 0.6400 (Msun/estimated)
Spectral type : K7
Metalicity : -0.1200
Absolute Magnitude : 5.52
Apparent Magnitude : 12.37
Right Ascension(RA) : 174.74564
Declination(DEC) : -3.90558
  • This is the K2-4 . The star K2-4 islocated about 761.8 light-years (233.6 pc) away from our Solar System.
  • The star K2-4 has apparent magnitude of 12.4, with absolute magnitude of 5.5.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4014 with its spectral types of K7
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet K2-4 b radius 0.187000 mass 0.016515 orbital distance 0.078000
    (Illustration of the K2-4's Planetary System)



    The Star K2-4 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.199 AU ( 29763753.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.275 AU ( 41141286.0 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.419 AU ( 62690215.4 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.617 AU ( 92251398.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-4)



    Kopparapu's Recent Venus for Star K2-4 distance : 0.223 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-4 distance : 0.282 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-4 distance : 0.272 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-4 distance : 0.298 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-4 distance : 0.535 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-4 distance : 0.564 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-4)



  • Original Kopparapu Recent Venus for Star K2-4 distance : 0.220 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-4 distance : 0.292 AU
  • Original Kopparapu Moist Greenhouse for Star K2-4 distance : 0.291 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-4 distance : 0.543 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-4 distance : 0.565 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-4)



    (Position in Stellar Map of star K2-4 )



    (Zoomed position in Stellar Map of star K2-4 (zoom level 3))

    (Synthetic Spectrum of star Kepler-820*)
    *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