GJ 338 B

Display orbital revolution around the star GJ 338 B
Imaginary Picture of Star GJ 338 B
Star Name : GJ 338 B
Alternate Name : HD 79211
Star Distance (LY/pc): 20.6587 (LY) 6.3340 (pc)
Stellar Radius (Rsun): 0.0000 (Rsun, measured) 0.5800 (Rsun, estimated)
Stellar Mass (Msun): 0.6400 (Msun/observed) 0.6400 (Msun/estimated)
Spectral type : M0.0 V
Metalicity : -0.0300
Absolute Magnitude : 5.79
Apparent Magnitude : 4.80
Right Ascension(RA) : 138.60283
Declination(DEC) : 52.68636
  • This is the GJ 338 B . The star GJ 338 B islocated about 20.7 light-years ( 6.3 pc) away from our Solar System.
  • The star GJ 338 B has apparent magnitude of 4.8, with absolute magnitude of 5.8.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4005 with its spectral types of M0.0 V
  • Number of Extrasolar Planets : 1
  • Name of the 1 Planet GJ 338 Bb radius 0.198331 mass 0.032700 orbital distance 0.142000
    (Illustration of the GJ 338 B's Planetary System)



    The Star GJ 338 B 's habitable zone is located at the following distance

    Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.202 AU ( 30150265.9 km)
    Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.279 AU ( 41675546.7 km)
    Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.425 AU ( 63504310.4 km)
    Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.625 AU ( 93449374.7 km)
    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 338 B)



    Kopparapu's Recent Venus for Star GJ 338 B distance : 0.226 AU
    Kopparapu's Runaway Greenhouse for Earth-sized planet for Star GJ 338 B distance : 0.286 AU
    Kopparapu's Runaway Greenhouse for Super-Earth-sized planet for Star GJ 338 B distance : 0.276 AU
    Kopparapu's Runaway Greenhouse for Mars-sized planet for Star GJ 338 B distance : 0.302 AU
    Kopparapu's Outer Boundary for Maximum Greenhouse for Star GJ 338 B distance : 0.542 AU
    Kopparapu's Outer Boundary for Early Mars for Star GJ 338 B distance : 0.572 AU
    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 338 B)



  • Original Kopparapu Recent Venus for Star GJ 338 B distance : 0.223 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 338 B distance : 0.295 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 338 B distance : 0.295 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 338 B distance : 0.551 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 338 B distance : 0.573 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 338 B)



    (Position in Stellar Map of star GJ 338 B )



    (Zoomed position in Stellar Map of star GJ 338 B (zoom level 3))

    (Synthetic Spectrum of star DW 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