Neptune waxay ku jirtaa masaafada u dhaxaysa 4.5 bilyan km (qiyaastii 30.1 astronomical units (AU)), waxayna dhameystirtaa wareeg celcelis ahaan 164.79 sano, iyadoo ku xiran isbeddelka qiyaastii ±0.1 sano. Masaafada perihelion waa 29.81 AU; masaafada aphelion waa 30.33 AU.On 11 July 2011, Neptune waxay dhameystirtay wareeggeedii ugu horreeyay ee buuxda ee baricentric tan iyo markii la helay 1846, in kasta oo aysan ka muuqan booskeeda saxda ah ee samada, maxaa yeelay dhulku wuxuu ku jiray meel ka duwan oo ku taal 365.26-maalmood. Sababtoo ah dhaqdhaqaaqa qorraxda ee la xiriirta barycentre ee Nidaamka Qorraxda, 11 July Neptune sidoo kale kuma jirin booskeeda saxda ah ee la xiriirta qorraxda; haddii la isticmaalo nidaamka wadajirka heliocentric ee caadiga ah, helitaanka waxaa la gaadhay 12 July 2011.
celcelis ahaan 164.79 sano kasta