Imaginary Picture of XO-1 b

Display orbital revolution of XO-1 b around the hoststar XO-1
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Exoplanet Name : XO-1 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.1840 (Rjup) 13.2715 (Rearth)
Mass (Mjup / Me): 0.9000 (Mjup) 286.1442 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0488 (AU) 0.0488 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0108
Orbital Period(Observed/Estimated) 3.94 (Days Obs.) 3.94 (Days Est.)
Surface Gravity (G Earth) 1.6246
Star Radiation at Atmospheric Boundary: 548377.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1214.5 (K)
Blackbody T 0.3(K) 1140.6 (K)
Blackbody T 0.7(K) 922.9 (K)
Tidally Locked Blackbody T 0.1(K) 1444.3 (K)
Tidally Locked Blackbody T 0.3(K) 1356.4 (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-1
Alternate Name :
Star Distance(LY) : 506.5
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 4.5 (GY)
Temperature : 5930 (K)
Spectral type : G1V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 5.3
Apparent Magnitude: 11.3
Right Ascension(RA) 240.5494
Declination (DEC) 28.1697
Hubble Space Telescope Guide Star Catalog (GSC) ID 02041-01657
Discovered by
Discovery Paper - Authors "P. R. McCullough, J. E. Stys, Jeff A. Valenti, C. M. Johns-Krull, K. A. Janes, J. N. Heasley, B. A. Bye, C. Dodd, S. W. Fleming, A. Pinnick, R. Bissinger, B. L. Gary, P. J. Howell, T. Vanmunster"
Discovery Paper - Title A Transiting Planet of a Sun-like Star
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=XO-1+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/XO-1%20b/
XO-1 b
XO-1 b

  • XO-1 b is an exoplanet orbiting the star XO-1, located about 506.5 light-years (155.3 pc) away from Solar System. Its discovery was publicly announced on 2006.
  • The host star XO-1 has apparent magnitude of 11.3, with absolute magnitude of 5.3.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5930 with its spectral types of G1V
  • In this planetary system, the extrasolar planet XO-1 b orbits around the star XO-1 every 3.9 days with its orbital distance of 0.05 AU ( 7300376.1 km)
  • (Projected orbit of XO-1 b around its host star XO-1)


  • The Star XO-1 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.707 AU ( 105758547.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.977 AU ( 146185949.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.489 AU ( 222755036.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.191 AU ( 327793795.0 km)
  • Radiation at Planetary Boundary of XO-1 b : 548377.83 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star XO-1)



  • Kopparapu Recent Venus for Star XO-1 distance : 0.726 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star XO-1 distance : 0.919 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star XO-1 distance : 0.888 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star XO-1 distance : 0.973 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-1 distance : 1.617 AU
  • Kopparapu Outer Boundary for Early Mars for Star XO-1 distance : 1.706 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star XO-1)



  • Original Kopparapu Recent Venus for Star XO-1 distance : 0.729 AU
  • Original Kopparapu Runaway Greenhouse for Star XO-1 distance : 0.944 AU
  • Original Kopparapu Moist Greenhouse for Star XO-1 distance : 0.965 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-1 distance : 1.646 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star XO-1 distance : 1.712 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star XO-1)



    (Position in Stellar Map of star XO-1 and its Exoplanet XO-1 b)



    (Zoomed position in Stellar Map of star XO-1 and its Exoplanet XO-1 b (zoom level 3))

    (Synthetic Spectrum of star XO-1*)
    *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