Imaginary Picture of XO-5 b
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Exoplanet Name : XO-5 b
Alternate Name :
Radius (Rjup / Re): 1.0300 (Rjup) 11.5453 (Rearth)
Mass (Mjup / Me): 1.0770 (Mjup) 342.4192 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0487 (AU) 0.0487 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0115
Orbital Period(Observed/Estimated) 4.19 (Days Obs.) 4.18 (Days Est.)
Star Radiation at Atmospheric Boundary: 535506.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1207.4 (K)
Blackbody T 0.3(K) 1133.8 (K)
Blackbody T 0.7(K) 917.4 (K)
Tidally Locked Blackbody T 0.1(K) 1435.8 (K)
Tidally Locked Blackbody T 0.3(K) 1348.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : XO-5
Alternate Name :
Star Distance(LY) : 831.7
Stellar Radius(Rsun) : 1.1 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 8.5 (GY)
Temperature : 5510 (K)
Spectral type : G8V
Metalicity : 0.2
Absolute Magnitude: 5.1
Apparent Magnitude: 12.1
Right Ascension(RA) 116.7165
Declination (DEC) 39.0947
Hubble Space Telescope Guide Star Catalog (GSC) ID 02959-00729
Discovered by
Discovery Paper - Authors "G.Maciejewski, M.Seeliger, Ch.Adam, St.Raetz, R.Neuhaeuser"
Discovery Paper - Title Refining Parameters of the XO-5 Planetary System with High-Precision Transit Photometry
Discovery Paper - Journal Accepted for publication in Acta Astronomic
Discovery Paper - URL https://arxiv.org/abs/1103.1325
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=XO-5+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/XO-5%20b/
XO-5 b
XO-5 b

  • XO-5 b is an exoplanet orbiting the star XO-5, located about 831.7 light-years (255.0 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star XO-5 has apparent magnitude of 12.1, with absolute magnitude of 5.1.
  • It is 0.9 times more massive and 1.1 times bigger compared with our Sun. The surface temperature is 5510 with its spectral types of G8V
  • In this planetary system, the extrasolar planet XO-5 b orbits around the star XO-5 every 4.2 days with its orbital distance of 0.05 AU ( 7285416.3 km)
  • (Projected orbit of XO-5 b around its host star XO-5)


  • The Star XO-5 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.697 AU ( 104295885.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.964 AU ( 144164169.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.468 AU ( 219674290.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.161 AU ( 323260342.2 km)
  • Radiation at Planetary Boundary of XO-5 b : 535506.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star XO-5)



  • Kopparapu Recent Venus for Star XO-5 distance : 0.734 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star XO-5 distance : 0.930 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star XO-5 distance : 0.898 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star XO-5 distance : 0.985 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-5 distance : 1.654 AU
  • Kopparapu Outer Boundary for Early Mars for Star XO-5 distance : 1.745 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star XO-5)



  • Original Kopparapu Recent Venus for Star XO-5 distance : 0.731 AU
  • Original Kopparapu Runaway Greenhouse for Star XO-5 distance : 0.956 AU
  • Original Kopparapu Moist Greenhouse for Star XO-5 distance : 0.968 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-5 distance : 1.683 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star XO-5 distance : 1.750 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star XO-5)



    (Position in Stellar Map of star XO-5 and its Exoplanet XO-5 b)



    (Zoomed position in Stellar Map of star XO-5 and its Exoplanet XO-5 b (zoom level 3))