I want to know the answer to the following question:
When did Neptune complete it's first barycentric orbit since it's discovery?
All the background I'm provided with is that "Because of the motion of the Sun in relation to the barycentre of the Solar System, on 11 July Neptune was also not at its exact discovery position in relation to the Sun; if the more common heliocentric coordinate system is used, the discovery longitude was reached on 12 July 2011.". Is that enough to answer the question?