Imaginary Picture of GJ 3512 b
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Exoplanet Name : GJ 3512 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.4630 (Mjup) 147.2053 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.3380 (AU) 0.3380 (AU Est.)
Eccentricity : 0.4356
Orbital Period(Yrs) 0.5574
Orbital Period(Observed/Estimated) 203.59 (Days Obs.) 204.65 (Days Est.)
Star Radiation at Atmospheric Boundary: 18.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 92.8 (K)
Blackbody T 0.3(K) 87.1 (K)
Blackbody T 0.7(K) 70.5 (K)
Tidally Locked Blackbody T 0.1(K) 110.4 (K)
Tidally Locked Blackbody T 0.3(K) 103.6 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : GJ 3512
Alternate Name :
Star Distance(LY) : 30.9
Stellar Radius(Rsun) : 0.1 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3081 (K)
Spectral type : M5.5V
Metalicity : -0.1
Absolute Magnitude: 22.1
Apparent Magnitude: 22.0
Right Ascension(RA) 1.0000
Declination (DEC) 2.0000
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+3512+&submit=SIMBAD+search
Open Exoplanet Database Link
GJ 3512 b
GJ 3512 b

  • GJ 3512 b is an exoplanet orbiting the star GJ 3512, located about 30.9 light-years ( 9.5 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star GJ 3512 has apparent magnitude of 22.0, with absolute magnitude of 22.1.
  • It is 0.1 times more massive and 0.1 times bigger compared with our Sun. The surface temperature is 3081 with its spectral types of M5.5V
  • In this planetary system, the extrasolar planet GJ 3512 b orbits around the star GJ 3512 every 203.6 days with its orbital distance of 0.34 AU ( 50564080.3 km)
  • (Projected orbit of GJ 3512 b around its host star GJ 3512)


  • The Star GJ 3512 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.029 AU ( 4276183.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.040 AU ( 5910802.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.060 AU ( 9006755.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.089 AU ( 13253835.1 km)
  • Radiation at Planetary Boundary of GJ 3512 b : 18.69 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 3512)



  • Kopparapu Recent Venus for Star GJ 3512 distance : 0.032 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 3512 distance : 0.041 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 3512 distance : 0.040 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 3512 distance : 0.044 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 3512 distance : 0.082 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 3512 distance : 0.086 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 3512)



  • Original Kopparapu Recent Venus for Star GJ 3512 distance : 0.032 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 3512 distance : 0.043 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 3512 distance : 0.043 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 3512 distance : 0.083 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 3512 distance : 0.086 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 3512)



    (Position in Stellar Map of star GJ 3512 and its Exoplanet GJ 3512 b)



    (Zoomed position in Stellar Map of star GJ 3512 and its Exoplanet GJ 3512 b (zoom level 3))