GJ 887

Display orbital revolution around the star GJ 887
Imaginary Picture of Star GJ 887
Star Name : GJ 887
Alternate Name : HD 217987
Star Distance (LY/pc): 10.7211 (LY) 3.2871 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.4712 (Rsun, estimated)
Stellar Mass (Msun): 0.4890 (Msun/observed) 0.4890 (Msun/estimated)
Spectral type : M1V
Metalicity : -0.0600
Absolute Magnitude : 9.76
Apparent Magnitude : 7.34
Right Ascension(RA) : 346.46681
Declination(DEC) : -35.85306
  • This is the GJ 887 . The star GJ 887 islocated about 10.7 light-years ( 3.3 pc) away from our Solar System.
  • The star GJ 887 has apparent magnitude of 7.3, with absolute magnitude of 9.8.
  • It is 0.5 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3688 with its spectral types of M1V
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet GJ 887 b radius 0.130383 mass 0.013200 orbital distance 0.068000
  • Name of the 2 Planet GJ 887 c radius 0.151615 mass 0.023900 orbital distance 0.120000
    (Illustration of the GJ 887's Planetary System)



    The Star GJ 887 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.139 AU ( 20770417.2 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.192 AU ( 28710144.5 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.292 AU ( 43747906.6 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.430 AU ( 64376961.1 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 887)



    Kopparapu's Recent Venus for Star GJ 887 distance : 0.156 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star GJ 887 distance : 0.198 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star GJ 887 distance : 0.191 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star GJ 887 distance : 0.209 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star GJ 887 distance : 0.382 AU
    Kopparapu's Outer Boundary for Early Mars for Star GJ 887 distance : 0.403 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 887)



  • Original Kopparapu Recent Venus for Star GJ 887 distance : 0.155 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 887 distance : 0.205 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 887 distance : 0.205 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 887 distance : 0.388 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 887 distance : 0.403 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 887)



    (Position in Stellar Map of star GJ 887 )



    (Zoomed position in Stellar Map of star GJ 887 (zoom level 3))

    (Synthetic Spectrum of star GJ 86*)
    *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