BD+20 2457

Display orbital revolution around the star BD+20 2457
Imaginary Picture of Star BD+20 2457
Star Name : BD+20 2457
Alternate Name :
Star Distance (LY/pc): 8153.9000 (LY) 2500.0000 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 1.8519 (Rsun, estimated)
Stellar Mass (Msun): 2.8000 (Msun/observed) 2.8000 (Msun/estimated)
Spectral type : K2II
Metalicity : -1.0000
Absolute Magnitude : -2.24
Apparent Magnitude : 9.75
Right Ascension(RA) : 154.18750
Declination(DEC) : 19.89139
  • This is the BD+20 2457 . The star BD+20 2457 islocated about 8153.9 light-years (2500.0 pc) away from our Solar System.
  • The star BD+20 2457 has apparent magnitude of 9.8, with absolute magnitude of -2.2.
  • It is 2.8 times more massive and 1.9 times bigger compared with our Sun. The surface temperature is 4127 with its spectral types of K2II
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet BD+20 2457 b radius 0.907830 mass 21.420000 orbital distance 1.450000
  • Name of the 2 Planet BD+20 2457 c radius 0.907830 mass 12.470000 orbital distance 2.010000
    (Illustration of the BD+20 2457's Planetary System)



    The Star BD+20 2457 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.683 AU ( 102219341.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.944 AU ( 141293843.6 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.439 AU ( 215300549.5 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.118 AU ( 316824190.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star BD+20 2457)



    Kopparapu's Recent Venus for Star BD+20 2457 distance : 0.435 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star BD+20 2457 distance : 0.551 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star BD+20 2457 distance : 0.532 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star BD+20 2457 distance : 0.583 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star BD+20 2457 distance : 1.038 AU
    Kopparapu's Outer Boundary for Early Mars for Star BD+20 2457 distance : 1.095 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star BD+20 2457)



  • Original Kopparapu Recent Venus for Star BD+20 2457 distance : 0.429 AU
  • Original Kopparapu Runaway Greenhouse for Star BD+20 2457 distance : 0.569 AU
  • Original Kopparapu Moist Greenhouse for Star BD+20 2457 distance : 0.568 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star BD+20 2457 distance : 1.055 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star BD+20 2457 distance : 1.097 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star BD+20 2457)



    (Position in Stellar Map of star BD+20 2457 )



    (Zoomed position in Stellar Map of star BD+20 2457 (zoom level 3))

    (Synthetic Spectrum of star BD+15 2940*)
    *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