K2-254

Display orbital revolution around the star K2-254
Imaginary Picture of Star K2-254
Star Name : K2-254
Alternate Name : "2MASS J12221217-0443019, EPIC 228849382, WISE J122212.18-044302.1"
Star Distance (LY/pc): 748.1843 (LY) 229.3946 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.6700 (Rsun, estimated)
Stellar Mass (Msun): 0.7100 (Msun/observed) 0.7100 (Msun/estimated)
Spectral type : K4
Metalicity : -0.1400
Absolute Magnitude : 5.18
Apparent Magnitude : 11.99
Right Ascension(RA) : 185.55075
Declination(DEC) : -4.71724
  • This is the K2-254 . The star K2-254 islocated about 748.2 light-years (229.4 pc) away from our Solar System.
  • The star K2-254 has apparent magnitude of 12.0, 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 4629 with its spectral types of K4
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet K2-254 b radius 0.145000 mass 0.013036 orbital distance 0.044800
  • Name of the 2 Planet K2-254 c radius 0.195000 mass 0.017171 orbital distance 0.092300
    (Illustration of the K2-254's Planetary System)



    The Star K2-254 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.311 AU ( 46527238.5 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.430 AU ( 64312802.6 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.655 AU ( 97998478.8 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.964 AU ( 144209054.6 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-254)



    Kopparapu's Recent Venus for Star K2-254 distance : 0.342 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star K2-254 distance : 0.433 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star K2-254 distance : 0.418 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star K2-254 distance : 0.458 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star K2-254 distance : 0.797 AU
    Kopparapu's Outer Boundary for Early Mars for Star K2-254 distance : 0.841 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-254)



  • Original Kopparapu Recent Venus for Star K2-254 distance : 0.337 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-254 distance : 0.447 AU
  • Original Kopparapu Moist Greenhouse for Star K2-254 distance : 0.447 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-254 distance : 0.810 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-254 distance : 0.842 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-254)



    (Position in Stellar Map of star K2-254 )



    (Zoomed position in Stellar Map of star K2-254 (zoom level 3))

    (Synthetic Spectrum of star Kepler-922*)
    *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