Imaginary Picture of XO-3 b
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Exoplanet Name : XO-3 b
Alternate Name :
Radius (Rjup / Re): 1.2170 (Rjup) 13.6414 (Rearth)
Mass (Mjup / Me): 11.7900 (Mjup) 3748.4890 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0454 (AU) 0.0454 (AU Est.)
Eccentricity : 0.2600
Orbital Period(Yrs) 0.0087
Orbital Period(Observed/Estimated) 3.19 (Days Obs.) 2.98 (Days Est.)
Star Radiation at Atmospheric Boundary: 2792805.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1824.5 (K)
Blackbody T 0.3(K) 1713.4 (K)
Blackbody T 0.7(K) 1386.3 (K)
Tidally Locked Blackbody T 0.1(K) 2169.8 (K)
Tidally Locked Blackbody T 0.3(K) 2037.6 (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-3
Alternate Name :
Star Distance(LY) : 848.0
Stellar Radius(Rsun) : 1.5 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.8 (GY)
Temperature : 6781 (K)
Spectral type : F5V
Metalicity : -0.1
Absolute Magnitude: 2.7
Apparent Magnitude: 9.8
Right Ascension(RA) 65.4696
Declination (DEC) 57.8169
Hubble Space Telescope Guide Star Catalog (GSC) ID 03727-01064
Discovered by
Discovery Paper - Authors "Joshua N. Winn, John Asher Johnson, Daniel Fabrycky, Andrew W. Howard, Geoffrey W. Marcy, Norio Narita, Ian J. Crossfield, Yasushi Suto, Edwin L. Turner, Gil Esquerdo"
Discovery Paper - Title ON THE SPIN-ORBIT MISALIGNMENT OF THE XO-3 EXOPLANETARY SYSTEM
Discovery Paper - Journal "The Astrophysical Journal,olume 700,umber 1"
Discovery Paper - URL http://iopscience.iop.org/article/10.1088/0004-637X/700/1/302/meta
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=XO-3+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/XO-3%20b/
XO-3 b
XO-3 b

  • XO-3 b is an exoplanet orbiting the star XO-3, located about 848.0 light-years (260.0 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star XO-3 has apparent magnitude of 9.8, with absolute magnitude of 2.7.
  • It is 1.4 times more massive and 1.5 times bigger compared with our Sun. The surface temperature is 6781 with its spectral types of F5V
  • In this planetary system, the extrasolar planet XO-3 b orbits around the star XO-3 every 3.2 days with its orbital distance of 0.05 AU ( 6791743.3 km)
  • (Projected orbit of XO-3 b around its host star XO-3)


  • The Star XO-3 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.484 AU ( 222040332.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.052 AU ( 306917766.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.126 AU ( 467674754.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.600 AU ( 688203889.0 km)
  • Radiation at Planetary Boundary of XO-3 b : 2792805.04 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star XO-3)



  • Kopparapu Recent Venus for Star XO-3 distance : 1.450 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star XO-3 distance : 1.837 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star XO-3 distance : 1.773 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star XO-3 distance : 1.943 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-3 distance : 3.183 AU
  • Kopparapu Outer Boundary for Early Mars for Star XO-3 distance : 3.357 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star XO-3)



  • Original Kopparapu Recent Venus for Star XO-3 distance : 1.484 AU
  • Original Kopparapu Runaway Greenhouse for Star XO-3 distance : 1.881 AU
  • Original Kopparapu Moist Greenhouse for Star XO-3 distance : 1.963 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-3 distance : 3.241 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star XO-3 distance : 3.370 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star XO-3)



    (Position in Stellar Map of star XO-3 and its Exoplanet XO-3 b)



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