The radial velocity measurements of the star XO-2 exhibit a long-term quadratic trend. This trend correlates with stellar activity indicators so is more likely due to the stellar activity cycle rather than being caused by reflex motion from a planet. Link to scientific paper Your name Note: Your commit will be vetted before it is merged into the public version. It is crucial that you include a link to a scientific publication. For more information on the meaning of the different datafields see the readme file in the Open Exoplanet Catalogue repository on github.