Imaginary Picture of XO-2 S b

Display orbital revolution of XO-2 S b around the hoststar XO-2 S
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Exoplanet Name : XO-2 S b
Alternate Name : "2MASS J07480748+5013032 b, GSC 3413-210 b, TYC 3413-210-1 b, WISE J074807.44+501301.5 b"
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.2600 (Mjup) 82.6639 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1300 (AU) 0.1300 (AU Est.)
Eccentricity : 0.1800
Orbital Period(Yrs) 0.0497
Orbital Period(Observed/Estimated) 18.16 (Days Obs.) 17.29 (Days Est.)
Surface Gravity (G Earth) 0.7983
Star Radiation at Atmospheric Boundary: 61655.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 703.3 (K)
Blackbody T 0.3(K) 660.5 (K)
Blackbody T 0.7(K) 534.4 (K)
Tidally Locked Blackbody T 0.1(K) 836.4 (K)
Tidally Locked Blackbody T 0.3(K) 785.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : XO-2 S
Alternate Name : "2MASS J07480748+5013032, GSC 3413-210, TYC 3413-210-1, WISE J074807.44+501301.5"
Star Distance(LY) : 496.0
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5399 (K)
Spectral type : G7
UV portion[%]: 6.4
Visible portion[%]: 42.4
IR portion[%]: 51.2
Metalicity : 0.4
Absolute Magnitude: 4.3
Apparent Magnitude: 10.2
Right Ascension(RA) 117.0312
Declination (DEC) 50.2176
Hubble Space Telescope Guide Star Catalog (GSC) ID 03413-00210
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=XO-2+S&submit=SIMBAD+search
Open Exoplanet Database Link
XO-2 S b
XO-2 S b
  • XO-2 S b is an exoplanet orbiting the star XO-2 S, located about 496.0 light-years (152.1 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star XO-2 S has apparent magnitude of 10.2, with absolute magnitude of 4.3.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5399 with its spectral types of G7
  • In this planetary system, the extrasolar planet XO-2 S b orbits around the star XO-2 S every 18.2 days with its orbital distance of 0.13 AU ( 19447723.2 km)
    • (Projected orbit of XO-2 S b around its host star XO-2 S)


  • The Star XO-2 S 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.631 AU ( 94468010.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.873 AU ( 130579477.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.330 AU ( 198974226.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.957 AU ( 292799290.7 km)
  • Radiation at Planetary Boundary of XO-2 S b : 61655.44 W/m2

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



  • Kopparapu Recent Venus for Star XO-2 S distance : 0.669 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star XO-2 S distance : 0.847 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star XO-2 S distance : 0.818 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star XO-2 S distance : 0.898 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-2 S distance : 1.513 AU
  • Kopparapu Outer Boundary for Early Mars for Star XO-2 S distance : 1.596 AU

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



  • Original Kopparapu Recent Venus for Star XO-2 S distance : 0.665 AU
  • Original Kopparapu Runaway Greenhouse for Star XO-2 S distance : 0.872 AU
  • Original Kopparapu Moist Greenhouse for Star XO-2 S distance : 0.880 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star XO-2 S distance : 1.539 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star XO-2 S distance : 1.601 AU

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



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



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

    (Synthetic Spectrum of star XO-2 S*)
    *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