The XO-2 S System
XO-2 S is a planetary system in the constellation Lynx hosting 3 confirmed exoplanets around 2 stars, about 494 light-years from Earth.
Star XO-2 S and Its Habitable Zone
XO-2 S
- Spectral type
- G8 V
- Surface temperature
- 5,325 K (Sun: 5,772 K)
- Mass
- 0.98 M☉
- Radius
- 1.02 R☉
Habitable zone of XO-2 S: 0.667–1.594 AU (conservative: 0.845–1.511 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 3 Planets in the XO-2 S System
Discovery History
The first planet found here, XO-2 S b, was discovered in 2014 using the radial velocity method. The most recent addition, XO-2 S d, followed in 2024.
Frequently Asked Questions About XO-2 S
How many planets does XO-2 S have?
XO-2 S has 3 confirmed exoplanets distributed around its 2 stars. More may await discovery.
Are any planets in the XO-2 S system habitable?
None of the known planets in XO-2 S orbit within the star's habitable zone.
How far away is XO-2 S?
XO-2 S is about 494 light-years from Earth in the constellation Lynx.
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