GJ 15A

Display orbital revolution around the star GJ 15A
Imaginary Picture of Star GJ 15A
Star Name : GJ 15A
Alternate Name : "HD 1326A, HIP 1475, GX Andromedae, Groombridge 34, M2"
Star Distance (LY/pc): 11.6992 (LY) 3.5870 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.3863 (Rsun, estimated)
Stellar Mass (Msun): 0.3750 (Msun/observed) 0.3750 (Msun/estimated)
Spectral type : M2V
Metalicity : -0.3200
Absolute Magnitude : 10.31
Apparent Magnitude : 8.08
Right Ascension(RA) : 4.59536
Declination(DEC) : 44.02295
  • This is the GJ 15A . The star GJ 15A islocated about 11.7 light-years ( 3.6 pc) away from our Solar System.
  • The star GJ 15A has apparent magnitude of 8.1, with absolute magnitude of 10.3.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3567 with its spectral types of M2V
  • Number of Extrasolar Planets : 2
  • Name of the 1 Planet GJ 15A b radius 0.119884 mass 0.009530 orbital distance 0.072000
  • Name of the 2 Planet GJ 15A c radius 0.263787 mass 0.113000 orbital distance 5.400000
    (Illustration of the GJ 15A's Planetary System)



    The Star GJ 15A 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.106 AU ( 15929019.3 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.147 AU ( 22018067.5 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.224 AU ( 33550662.2 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.330 AU ( 49371269.2 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 15A)



    Kopparapu's Recent Venus for Star GJ 15A distance : 0.120 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star GJ 15A distance : 0.152 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star GJ 15A distance : 0.147 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star GJ 15A distance : 0.161 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star GJ 15A distance : 0.295 AU
    Kopparapu's Outer Boundary for Early Mars for Star GJ 15A distance : 0.311 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 15A)



  • Original Kopparapu Recent Venus for Star GJ 15A distance : 0.119 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 15A distance : 0.157 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 15A distance : 0.158 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 15A distance : 0.300 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 15A distance : 0.312 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 15A)



    (Position in Stellar Map of star GJ 15A )



    (Zoomed position in Stellar Map of star GJ 15A (zoom level 3))

    (Synthetic Spectrum of star *)
    *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