----------------------------------- s.p.a.c.e 28 Mar 2020 17:02 ----------------------------------- https://en.wikipedia.org/wiki/Jet_Propulsion_Laboratory_Development_Ephemeris ftp://ssd.jpl.nasa.gov/pub/eph/planets/ascii/ Deci, care este valoarea? In mod normal ar trebui rezolvat numeric, prin integrare in sistem 'n-body'. Dar cum problema a fost deja rezolvata, incluzand perturbatiile de la principalii asteroizi cunoscuti, se pot folosi efemeridele deja publicate in modelele DE. Spre exemplu in Stellarium. https://github.com/Stellarium/stellarium/blob/master/src/core/planetsephems/de431.cpp Sau alternativa simplificata, dar totusi mai buna decat o extrapolare a unei valori medii - prin dezvoltarea in serie, folosind VSOP. https://en.wikipedia.org/wiki/VSOP_%28planets%29