Imaginary Picture of Fomalhaut b

Display orbital revolution of Fomalhaut b around the hoststar Fomalhaut
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Exoplanet Name : Fomalhaut b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.2080 (Mjup) 66.1311 (Mearth)
Semi Major Axis / Orbital Distance Calculated 117.0000 (AU) 117.0000 (AU Est.)
Eccentricity : 0.1100
Orbital Period(Yrs) 876.0883
Orbital Period(Observed/Estimated) 320000.00 (Days Obs.) 333594.13 (Days Est.)
Surface Gravity (G Earth) 0.6387
Star Radiation at Atmospheric Boundary: 1.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 50.6 (K)
Blackbody T 0.3(K) 47.5 (K)
Blackbody T 0.7(K) 38.5 (K)
Tidally Locked Blackbody T 0.1(K) 60.2 (K)
Tidally Locked Blackbody T 0.3(K) 56.5 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Fomalhaut
Alternate Name : HD 216956
Star Distance(LY) : 25.1
Stellar Radius(Rsun) : 1.8 (Rsun Measured)
Stellar Mass(Msun) : 1.9 (Msun Measured) 2.1 (Msun Estimated)
Star Age : 0.4 (GY)
Temperature : 8590 (K)
Spectral type : A3 V
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 1.7
Apparent Magnitude: 1.2
Right Ascension(RA) 344.4127
Declination (DEC) -29.6222
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Paul Kalas, James R. Graham, Michael P. Fitzgerald, Mark Clampin"
Discovery Paper - Title STIS Coronagraphic Imaging of Fomalhaut: Main Belt Structure and the Orbit of Fomalhaut b
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Fomalhaut+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Fomalhaut%20b/
Fomalhaut b
Fomalhaut b

  • Fomalhaut b is an exoplanet orbiting the star Fomalhaut, located about 25.1 light-years ( 7.7 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star Fomalhaut has apparent magnitude of 1.2, with absolute magnitude of 1.7.
  • It is 1.9 times more massive and 1.8 times bigger compared with our Sun. The surface temperature is 8590 with its spectral types of A3 V
  • In this planetary system, the extrasolar planet Fomalhaut b orbits around the star Fomalhaut every 320000.0 days with its orbital distance of 117.00 AU ( 17502950871.9 km)
  • (Projected orbit of Fomalhaut b around its host star Fomalhaut)


  • The Star Fomalhaut 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 2.944 AU ( 440487984.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 4.070 AU ( 608869507.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 6.202 AU ( 927782386.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 9.126 AU ( 1365272425.5 km)
  • Radiation at Planetary Boundary of Fomalhaut b : 1.65 W/m2

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



  • Kopparapu Recent Venus for Star Fomalhaut distance : 2.814 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Fomalhaut distance : 3.565 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Fomalhaut distance : 3.443 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Fomalhaut distance : 3.765 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Fomalhaut distance : 6.159 AU
  • Kopparapu Outer Boundary for Early Mars for Star Fomalhaut distance : 6.493 AU

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



  • Original Kopparapu Recent Venus for Star Fomalhaut distance : 2.908 AU
  • Original Kopparapu Runaway Greenhouse for Star Fomalhaut distance : 3.632 AU
  • Original Kopparapu Moist Greenhouse for Star Fomalhaut distance : 3.847 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Fomalhaut distance : 6.261 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Fomalhaut distance : 6.511 AU

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



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



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

    (Synthetic Spectrum of star Fomalhaut*)
    *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