Imaginary Picture of GJ 3021 b
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Exoplanet Name : GJ 3021 b
Alternate Name : "2MASS J00161266-7951042 b, TYC 9354-00780-1 b, HIP 1292 b,
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 3.3700 (Mjup) 1071.4511 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.4900 (AU) 0.4900 (AU Est.)
Eccentricity : 0.5110
Orbital Period(Yrs) 0.3661
Orbital Period(Observed/Estimated) 133.71 (Days Obs.) 132.06 (Days Est.)
Star Radiation at Atmospheric Boundary: 3897.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 352.6 (K)
Blackbody T 0.3(K) 331.2 (K)
Blackbody T 0.7(K) 267.9 (K)
Tidally Locked Blackbody T 0.1(K) 419.4 (K)
Tidally Locked Blackbody T 0.3(K) 393.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : GJ 3021
Alternate Name :
Star Distance(LY) : 57.5
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 8.8 (GY)
Temperature : 5540 (K)
Spectral type : G6 V
Metalicity : 0.1
Absolute Magnitude: 5.4
Apparent Magnitude: 6.6
Right Ascension(RA) 4.0528
Declination (DEC) -79.8511
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+3021+&submit=SIMBAD+search
Open Exoplanet Database Link 0
GJ 3021 b
GJ 3021 b

  • GJ 3021 b is an exoplanet orbiting the star GJ 3021, located about 57.5 light-years (17.6 pc) away from Solar System. Its discovery was publicly announced on 2000.
  • The host star GJ 3021 has apparent magnitude of 6.6, with absolute magnitude of 5.4.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5540 with its spectral types of G6 V
  • In this planetary system, the extrasolar planet GJ 3021 b orbits around the star GJ 3021 every 133.7 days with its orbital distance of 0.49 AU ( 73302956.6 km)
  • (Projected orbit of GJ 3021 b around its host star GJ 3021)


  • The Star GJ 3021 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.598 AU ( 89520016.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.827 AU ( 123740056.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.260 AU ( 188552462.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.855 AU ( 277463208.6 km)
  • Radiation at Planetary Boundary of GJ 3021 b : 3897.06 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 3021)



  • Kopparapu Recent Venus for Star GJ 3021 distance : 0.629 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 3021 distance : 0.796 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 3021 distance : 0.769 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 3021 distance : 0.844 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 3021 distance : 1.416 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 3021 distance : 1.494 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 3021)



  • Original Kopparapu Recent Venus for Star GJ 3021 distance : 0.627 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 3021 distance : 0.819 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 3021 distance : 0.830 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 3021 distance : 1.441 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 3021 distance : 1.498 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 3021)



    (Position in Stellar Map of star GJ 3021 and its Exoplanet GJ 3021 b)



    (Zoomed position in Stellar Map of star GJ 3021 and its Exoplanet GJ 3021 b (zoom level 3))