Imaginary Picture of Gaia-2 b

Display orbital revolution of Gaia-2 b around the hoststar Gaia-2
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Exoplanet Name : Gaia-2 b
Alternate Name : "Gaia EDR3 1107980654748582144 b, TIC 147797743"
Status : Confirmed
Radius (Rjup / Re): 1.3270 (Rjup) 14.8743 (Rearth)
Mass (Mjup / Me): 0.7730 (Mjup) 245.7661 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0467 (AU) 0.0467 (AU Est.)
Eccentricity : 0.3460
Orbital Period(Yrs) 0.0101
Orbital Period(Observed/Estimated) 3.69 (Days Obs.) 3.69 (Days Est.)
Surface Gravity (G Earth) 1.1108
Star Radiation at Atmospheric Boundary: 681456.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1282.3 (K)
Blackbody T 0.3(K) 1204.2 (K)
Blackbody T 0.7(K) 974.4 (K)
Tidally Locked Blackbody T 0.1(K) 1525.0 (K)
Tidally Locked Blackbody T 0.3(K) 1432.1 (K)
Size Class: Super-Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Gaia-2
Alternate Name : EDR3 1107980654748582144
Star Distance(LY) : 675.8
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5720 (K)
Spectral type : G4
UV portion[%]: 7.7
Visible portion[%]: 44.5
IR portion[%]: 47.8
Metalicity : 0.0
Absolute Magnitude: 4.7
Apparent Magnitude: 11.3
Right Ascension(RA) 110.7353
Declination (DEC) 67.2527
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Gaia-2 b
Gaia-2 b

  • Gaia-2 b is an exoplanet orbiting the star Gaia-2, located about 675.8 light-years (207.2 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star Gaia-2 has apparent magnitude of 11.3, with absolute magnitude of 4.7.
  • It is 1.0 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5720 with its spectral types of G4
  • In this planetary system, the extrasolar planet Gaia-2 b orbits around the star Gaia-2 every 3.7 days with its orbital distance of 0.05 AU ( 6986220.6 km)
  • (Projected orbit of Gaia-2 b around its host star Gaia-2)


  • The Star Gaia-2 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.754 AU ( 112821481.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.042 AU ( 155948771.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.588 AU ( 237631415.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.338 AU ( 349685038.3 km)
  • Radiation at Planetary Boundary of Gaia-2 b : 681456.94 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Gaia-2)



  • Kopparapu Recent Venus for Star Gaia-2 distance : 0.784 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Gaia-2 distance : 0.993 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Gaia-2 distance : 0.959 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Gaia-2 distance : 1.052 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Gaia-2 distance : 1.757 AU
  • Kopparapu Outer Boundary for Early Mars for Star Gaia-2 distance : 1.853 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Gaia-2)



  • Original Kopparapu Recent Venus for Star Gaia-2 distance : 0.785 AU
  • Original Kopparapu Runaway Greenhouse for Star Gaia-2 distance : 1.021 AU
  • Original Kopparapu Moist Greenhouse for Star Gaia-2 distance : 1.038 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Gaia-2 distance : 1.788 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Gaia-2 distance : 1.859 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Gaia-2)



    (Position in Stellar Map of star Gaia-2 and its Exoplanet Gaia-2 b)



    (Zoomed position in Stellar Map of star Gaia-2 and its Exoplanet Gaia-2 b (zoom level 3))

    (Synthetic Spectrum of star Gaia-2*)
    *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