K2-381

Display orbital revolution around the star K2-381
Imaginary Picture of Star K2-381
Star Name : K2-381
Alternate Name : EPIC 217192839
Star Distance (LY/pc): 475.2126 (LY) 145.7010 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.6750 (Rsun, estimated)
Stellar Mass (Msun): 0.7540 (Msun/observed) 0.7540 (Msun/estimated)
Spectral type : K5
Metalicity : -0.2440
Absolute Magnitude : 7.18
Apparent Magnitude : 13.00
Right Ascension(RA) : 288.02500
Declination(DEC) : -21.00750
  • This is the K2-381 . The star K2-381 islocated about 475.2 light-years (145.7 pc) away from our Solar System.
  • The star K2-381 has apparent magnitude of 13.0, with absolute magnitude of 7.2.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4473 with its spectral types of K5
  • Number of Extrasolar Planets : 3
  • Name of the 1 Planet K2-381 b radius 0.198100 mass 0.017425 orbital distance 0.113060
  • Name of the 2 Planet K2-381 c radius 0.088860 mass 0.003034 orbital distance 0.070000
  • Name of the 3 Planet K2-381 d radius 0.150330 mass 0.013481 orbital distance 0.159237
    (Illustration of the K2-381's Planetary System)



    The Star K2-381 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.293 AU ( 43768300.3 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.404 AU ( 60499229.1 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.616 AU ( 92187436.6 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.907 AU ( 135657851.5 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-381)



    Kopparapu's Recent Venus for Star K2-381 distance : 0.323 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-381 distance : 0.409 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-381 distance : 0.395 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-381 distance : 0.434 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-381 distance : 0.759 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-381 distance : 0.801 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-381)



  • Original Kopparapu Recent Venus for Star K2-381 distance : 0.319 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-381 distance : 0.423 AU
  • Original Kopparapu Moist Greenhouse for Star K2-381 distance : 0.422 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-381 distance : 0.772 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-381 distance : 0.803 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-381)



    (Position in Stellar Map of star K2-381 )



    (Zoomed position in Stellar Map of star K2-381 (zoom level 3))

    (Synthetic Spectrum of star Kepler-974*)
    *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