The XO-2 S system contains 3 exoplanets. It is located 493.79 light years away from the solar system.
| Mass | 0.98 solar masses |
| Radius | 1 solar radiae |
| Temperature | 5399 kelvin |
| Stellar Metallicity | 0.39 decimal exponent |
| Age | 7.1 billion years |
At more than 50 Earth masses, XO-2 S b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 82.636 Earth masses |
| Density | 0.351 grams per cubic centimeter |
| Radius | 10.900 Earth radiae |
| Semi-major Axis | 0.13 AU |
| Eccentricity | 0.18 |
| Orbital Period | 18.157 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Roque de los Muchachos Observatory |
| Discovery Telescope | 3.58 m Telescopio Nazionale Galileo |
| Discovery Instrument | HARPS-N Spectrograph |
| Discovery Date | 2014-07 |
| Reference | Desidera et al. 2014 |
At more than 50 Earth masses, XO-2 S c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 435.409 Earth masses |
| Density | 0.951 grams per cubic centimeter |
| Radius | 13.600 Earth radiae |
| Semi-major Axis | 0.4756 AU |
| Eccentricity | 0.1528 |
| Orbital Period | 120.800 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Roque de los Muchachos Observatory |
| Discovery Telescope | 3.58 m Telescopio Nazionale Galileo |
| Discovery Instrument | HARPS-N Spectrograph |
| Discovery Date | 2014-07 |
| Reference | Desidera et al. 2014 |