HD 20868

Display orbital revolution around the star HD 20868
Imaginary Picture of Star HD 20868
Star Name : HD 20868
Alternate Name :
Star Distance (LY/pc): 157.1836 (LY) 48.1928 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.7900 (Rsun, estimated)
Stellar Mass (Msun): 0.7800 (Msun/observed) 0.7800 (Msun/estimated)
Spectral type : K3/4IV
Metalicity : 0.0400
Absolute Magnitude : 6.51
Apparent Magnitude : 9.92
Right Ascension(RA) : 50.17789
Declination(DEC) : -33.73000
  • This is the HD 20868 . The star HD 20868 islocated about 157.2 light-years (48.2 pc) away from our Solar System.
  • The star HD 20868 has apparent magnitude of 9.9, with absolute magnitude of 6.5.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 4795 with its spectral types of K3/4IV
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet HD 20868 b radius 0.907830 mass 1.990000 orbital distance 0.947000
    (Illustration of the HD 20868's Planetary System)



    The Star HD 20868 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.393 AU ( 58865715.4 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.544 AU ( 81367802.2 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.829 AU ( 123986523.9 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.220 AU ( 182451601.4 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 20868)



    Kopparapu's Recent Venus for Star HD 20868 distance : 0.430 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star HD 20868 distance : 0.544 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star HD 20868 distance : 0.525 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star HD 20868 distance : 0.576 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star HD 20868 distance : 0.994 AU
    Kopparapu's Outer Boundary for Early Mars for Star HD 20868 distance : 1.049 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 20868)



  • Original Kopparapu Recent Venus for Star HD 20868 distance : 0.424 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 20868 distance : 0.561 AU
  • Original Kopparapu Moist Greenhouse for Star HD 20868 distance : 0.562 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 20868 distance : 1.011 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 20868 distance : 1.051 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 20868)



    (Position in Stellar Map of star HD 20868 )



    (Zoomed position in Stellar Map of star HD 20868 (zoom level 3))

    (Synthetic Spectrum of star HATS-68*)
    *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