Imaginary Picture of GJ 317 b
/
Exoplanet Name : GJ 317 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 2.3298 (Mjup) 740.7320 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.1100 (AU) 1.1100 (AU Est.)
Eccentricity : 0.0200
Orbital Period(Yrs) 1.9115
Orbital Period(Observed/Estimated) 698.20 (Days Obs.) 659.10 (Days Est.)
Star Radiation at Atmospheric Boundary: 25.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 100.5 (K)
Blackbody T 0.3(K) 94.4 (K)
Blackbody T 0.7(K) 76.4 (K)
Tidally Locked Blackbody T 0.1(K) 119.6 (K)
Tidally Locked Blackbody T 0.3(K) 112.3 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : GJ 317
Alternate Name :
Star Distance(LY) : 49.9
Stellar Radius(Rsun) : 0.4 (Rsun Estimated)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3510 (K)
Spectral type : M3.5
Metalicity : 0.4
Absolute Magnitude: 11.1
Apparent Magnitude: 12.0
Right Ascension(RA) 130.2468
Declination (DEC) -23.4564
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+317+&submit=SIMBAD+search
Open Exoplanet Database Link 0
GJ 317 b
GJ 317 b

  • GJ 317 b is an exoplanet orbiting the star GJ 317, located about 49.9 light-years (15.3 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star GJ 317 has apparent magnitude of 12.0, with absolute magnitude of 11.1.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3510 with its spectral types of M3.5
  • In this planetary system, the extrasolar planet GJ 317 b orbits around the star GJ 317 every 698.2 days with its orbital distance of 1.11 AU ( 166053636.5 km)
  • (Projected orbit of GJ 317 b around its host star GJ 317)


  • The Star GJ 317 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.110 AU ( 16485882.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.152 AU ( 22787798.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.232 AU ( 34723561.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.342 AU ( 51097241.5 km)
  • Radiation at Planetary Boundary of GJ 317 b : 25.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 317)



  • Kopparapu Recent Venus for Star GJ 317 distance : 0.124 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 317 distance : 0.158 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 317 distance : 0.152 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 317 distance : 0.167 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 317 distance : 0.306 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 317 distance : 0.323 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 317)



  • Original Kopparapu Recent Venus for Star GJ 317 distance : 0.123 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 317 distance : 0.163 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 317 distance : 0.163 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 317 distance : 0.311 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 317 distance : 0.324 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 317)



    (Position in Stellar Map of star GJ 317 and its Exoplanet GJ 317 b)



    (Zoomed position in Stellar Map of star GJ 317 and its Exoplanet GJ 317 b (zoom level 3))