GJ 581

Display orbital revolution around the star GJ 581
Imaginary Picture of Star GJ 581
Star Name : GJ 581
Alternate Name : GJ 581
Star Distance (LY/pc): 20.5595 (LY) 6.3036 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.3000 (Rsun, estimated)
Stellar Mass (Msun): 0.3100 (Msun/observed) 0.3100 (Msun/estimated)
Spectral type : M2.5V
Metalicity : -0.1350
Absolute Magnitude : 11.55
Apparent Magnitude : 10.55
Right Ascension(RA) : 229.86176
Declination(DEC) : -7.72222
  • This is the GJ 581 . The star GJ 581 islocated about 20.6 light-years ( 6.3 pc) away from our Solar System.
  • The star GJ 581 has apparent magnitude of 10.6, with absolute magnitude of 11.6.
  • It is 0.3 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3498 with its spectral types of M2.5V
  • Number of Extrasolar Planets : 3
  • Name of the 1 Planet GJ 581 b radius 0.216449 mass 0.047820 orbital distance 0.041000
  • Name of the 2 Planet GJ 581 c radius 0.140688 mass 0.017783 orbital distance 0.074000
  • Name of the 3 Planet GJ 581 e radius 0.102389 mass 0.005214 orbital distance 0.029000
    (Illustration of the GJ 581's Planetary System)



    The Star GJ 581 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.080 AU ( 11896493.7 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.110 AU ( 16444063.2 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.167 AU ( 25057113.2 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.246 AU ( 36872639.8 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 581)



    Kopparapu's Recent Venus for Star GJ 581 distance : 0.090 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star GJ 581 distance : 0.114 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star GJ 581 distance : 0.110 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star GJ 581 distance : 0.120 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star GJ 581 distance : 0.221 AU
    Kopparapu's Outer Boundary for Early Mars for Star GJ 581 distance : 0.233 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 581)



  • Original Kopparapu Recent Venus for Star GJ 581 distance : 0.089 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 581 distance : 0.118 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 581 distance : 0.118 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 581 distance : 0.225 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 581 distance : 0.234 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 581)



    (Position in Stellar Map of star GJ 581 )



    (Zoomed position in Stellar Map of star GJ 581 (zoom level 3))

    (Synthetic Spectrum of star EPIC 212036875*)
    *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