Imaginary Picture of GJ 480 b

Display orbital revolution of GJ 480 b around the hoststar GJ 480
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Exoplanet Name : GJ 480 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2095 (Rjup) 2.3484 (Rearth)
Mass (Mjup / Me): 0.0415 (Mjup) 13.1944 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0680 (AU) 0.0680 (AU Est.)
Eccentricity : 0.1000
Orbital Period(Yrs) 0.0262
Orbital Period(Observed/Estimated) 9.57 (Days Obs.) 5.91 (Days Est.)
Surface Gravity (G Earth) 2.3926
Star Radiation at Atmospheric Boundary: 7981.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 421.8 (K)
Blackbody T 0.3(K) 396.2 (K)
Blackbody T 0.7(K) 320.5 (K)
Tidally Locked Blackbody T 0.1(K) 501.7 (K)
Tidally Locked Blackbody T 0.3(K) 471.1 (K)
Size Class: sub-Neptune-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 480
Alternate Name :
Star Distance(LY) : 46.5
Stellar Radius(Rsun) : 0.4 (Rsun Estimated)
Stellar Mass(Msun) : 1.2 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3500 (K)
Spectral type : M3.5
UV portion[%]: 0.3
Visible portion[%]: 14.5
IR portion[%]: 85.2
Metalicity : 0.0
Absolute Magnitude: 10.7
Apparent Magnitude: 11.5
Right Ascension(RA) 189.7185
Declination (DEC) 11.6961
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+480+&submit=SIMBAD+search
Open Exoplanet Database Link
GJ 480 b
GJ 480 b

  • GJ 480 b is an exoplanet orbiting the star GJ 480, located about 46.5 light-years (14.2 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star GJ 480 has apparent magnitude of 11.5, with absolute magnitude of 10.7.
  • It is 1.2 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3500 with its spectral types of M3.5
  • In this planetary system, the extrasolar planet GJ 480 b orbits around the star GJ 480 every 9.6 days with its orbital distance of 0.07 AU ( 10172655.2 km)
  • (Projected orbit of GJ 480 b around its host star GJ 480)


  • The Star GJ 480 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.119 AU ( 17778498.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.164 AU ( 24574530.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.250 AU ( 37446146.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.368 AU ( 55103644.3 km)
  • Radiation at Planetary Boundary of GJ 480 b : 7981.07 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star GJ 480)



  • Kopparapu Recent Venus for Star GJ 480 distance : 0.134 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star GJ 480 distance : 0.170 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star GJ 480 distance : 0.164 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star GJ 480 distance : 0.181 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 480 distance : 0.331 AU
  • Kopparapu Outer Boundary for Early Mars for Star GJ 480 distance : 0.349 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star GJ 480)



  • Original Kopparapu Recent Venus for Star GJ 480 distance : 0.133 AU
  • Original Kopparapu Runaway Greenhouse for Star GJ 480 distance : 0.176 AU
  • Original Kopparapu Moist Greenhouse for Star GJ 480 distance : 0.176 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star GJ 480 distance : 0.336 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star GJ 480 distance : 0.349 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star GJ 480)



    (Position in Stellar Map of star GJ 480 and its Exoplanet GJ 480 b)



    (Zoomed position in Stellar Map of star GJ 480 and its Exoplanet GJ 480 b (zoom level 3))

    (Synthetic Spectrum of star GJ 480*)
    *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