The XO-1 system contains 1 exoplanet. It is located 533.44 light years away from the solar system.
| Mass | 0.88 solar masses |
| Radius | 0.88 solar radiae |
| Temperature | 5750 kelvin |
| Stellar Metallicity | 0.02 decimal exponent |
| Age | 0.9 billion years |
At more than 50 Earth masses, XO-1 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 263.799 Earth masses |
| Density | 0.640 grams per cubic centimeter |
| Radius | 12.778 Earth radiae |
| Semi-major Axis | 0.0488 AU |
| Eccentricity | 0 |
| Orbital Period | 3.942 days |
| Discovery Method | Transit |
| Discovery Facility | XO |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | Apogee CCD Array |
| Discovery Date | 2006-09 |
| Reference | McCullough et al. 2006 |