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s.p.a.c.e

28 Mar 2020 18:02



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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