GJ 687

Display orbital revolution around the star GJ 687
Imaginary Picture of Star GJ 687
Star Name : GJ 687
Alternate Name :
Star Distance (LY/pc): 14.8401 (LY) 4.5500 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.4183 (Rsun, estimated)
Stellar Mass (Msun): 0.4130 (Msun/observed) 0.4130 (Msun/estimated)
Spectral type : M3.5V
Metalicity : 0.0000
Absolute Magnitude : 10.86
Apparent Magnitude : 9.15
Right Ascension(RA) : 264.10833
Declination(DEC) : 68.33917
  • This is the GJ 687 . The star GJ 687 islocated about 14.8 light-years ( 4.5 pc) away from our Solar System.
  • The star GJ 687 has apparent magnitude of 9.2, with absolute magnitude of 10.9.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3413 with its spectral types of M3.5V
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet GJ 687 b radius 0.222680 mass 0.054100 orbital distance 0.163000
  • Name of the 2 Planet GJ 687 c radius 0.218680 mass 0.050000 orbital distance 1.165000
    (Illustration of the GJ 687's Planetary System)



    The Star GJ 687 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.106 AU ( 15791324.3 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.146 AU ( 21827737.0 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.222 AU ( 33260640.7 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.327 AU ( 48944489.9 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 687)



    Kopparapu's Recent Venus for Star GJ 687 distance : 0.119 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star GJ 687 distance : 0.151 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star GJ 687 distance : 0.146 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star GJ 687 distance : 0.159 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star GJ 687 distance : 0.295 AU
    Kopparapu's Outer Boundary for Early Mars for Star GJ 687 distance : 0.311 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 687)



  • Original Kopparapu Recent Venus for Star GJ 687 distance : 0.118 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 687 distance : 0.156 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 687 distance : 0.157 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 687 distance : 0.300 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 687 distance : 0.312 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 687)



    (Position in Stellar Map of star GJ 687 )



    (Zoomed position in Stellar Map of star GJ 687 (zoom level 3))

    (Synthetic Spectrum of star EZ Lyn*)
    *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