K2-128

Display orbital revolution around the star K2-128
Imaginary Picture of Star K2-128
Star Name : K2-128
Alternate Name : "EPIC 212686205, 2MASS J13374504-0835494, WISE J133745.03-083549.4"
Star Distance (LY/pc): 375.0989 (LY) 115.0060 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.7800 (Rsun, estimated)
Stellar Mass (Msun): 0.7100 (Msun/observed) 0.7100 (Msun/estimated)
Spectral type : K4V
Metalicity : 0.0000
Absolute Magnitude : 5.19
Apparent Magnitude : 10.49
Right Ascension(RA) : 204.43766
Declination(DEC) : -8.59707
  • This is the K2-128 . The star K2-128 islocated about 375.1 light-years (115.0 pc) away from our Solar System.
  • The star K2-128 has apparent magnitude of 10.5, with absolute magnitude of 5.2.
  • It is 0.7 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4469 with its spectral types of K4V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet K2-128 b radius 0.127000 mass 0.011050 orbital distance 0.056000
    (Illustration of the K2-128's Planetary System)



    The Star K2-128 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.337 AU ( 50486286.1 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.466 AU ( 69785241.1 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.711 AU ( 106337264.0 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.046 AU ( 156479942.3 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-128)



    Kopparapu's Recent Venus for Star K2-128 distance : 0.373 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-128 distance : 0.472 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-128 distance : 0.456 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-128 distance : 0.500 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-128 distance : 0.876 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-128 distance : 0.924 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-128)



  • Original Kopparapu Recent Venus for Star K2-128 distance : 0.368 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-128 distance : 0.488 AU
  • Original Kopparapu Moist Greenhouse for Star K2-128 distance : 0.487 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-128 distance : 0.890 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-128 distance : 0.926 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-128)



    (Position in Stellar Map of star K2-128 )



    (Zoomed position in Stellar Map of star K2-128 (zoom level 3))

    (Synthetic Spectrum of star Kepler-851*)
    *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