Vanyx long-span Solar System ephemeris pack (long-ephemeris-v1)

Numerical data derived from NASA/JPL-Caltech Solar System Dynamics products:
- JPL planetary and lunar ephemeris DE440, via NASA NAIF (naif.jpl.nasa.gov). Cite: Park, R. S., Folkner, W. M., Williams, J. G., & Boggs, D. H. (2021). The JPL Planetary and Lunar Ephemerides DE440 and DE441. The Astronomical Journal, 161(3), 105. doi:10.3847/1538-3881/abd414
- JPL Solar System Dynamics "Planetary Satellite Mean Elements" (live page and archived 2020 edition). Cite: JPL Solar System Dynamics, "Planetary Satellite Mean Elements" (https://ssd.jpl.nasa.gov/sats/elem/); elements derived by JPL from its satellite ephemerides (MAR099, JUP365, JUP347, SAT441, SAT415, URA182, NEP097, NEP105, PLU060; references listed on the page).
- E. M. Standish, "Keplerian Elements for Approximate Positions of the Major Planets" (JPL SSD). Cite: Standish, E. M., "Keplerian Elements for Approximate Positions of the Major Planets", JPL Solar System Dynamics; derived from Standish, E. M. & Williams, J. G. (1992), Orbital Ephemerides of the Sun, Moon, and Planets, in Explanatory Supplement to the Astronomical Almanac (P. K. Seidelmann, ed.), University Science Books.
- JPL Horizons (validation only). Cite: Giorgini, J. D. et al. (1996). JPL's On-Line Solar System Data Service. Bulletin of the American Astronomical Society, 28(3), 1158; JPL Horizons API https://ssd-api.jpl.nasa.gov/doc/horizons.html
- NAIF PCK pck00011 (IAU WGCCRE 2015 poles). Cite: Archinal, B. A. et al. (2018). Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015. Celestial Mechanics and Dynamical Astronomy, 130, 22.
- Retired JPL files (Standish text tables incl. Pluto; satellite elements 2013 edition) are byte copies obtained from the Internet Archive (web.archive.org).

Deep-time guidance cites: Laskar, J. (1989). A numerical experiment on the chaotic behaviour of the Solar System. Nature, 338, 237-238. doi:10.1038/338237a0; Laskar, J., Fienga, A., Gastineau, M., & Manche, H. (2011). La2010: a new orbital solution for the long-term motion of the Earth. Astronomy & Astrophysics, 532, A89. doi:10.1051/0004-6361/201116836 (arXiv:1103.1084); Laskar, J. & Gastineau, M. (2009). Existence of collisional trajectories of Mercury, Mars and Venus with the Earth. Nature, 459, 817-819. doi:10.1038/nature08096; Mogavero, F., Hoang, N. H., & Laskar, J. (2023). Timescales of Chaos in the Inner Solar System: Lyapunov Spectrum and Quasi-integrals of Motion. Physical Review X, 13, 021018. doi:10.1103/PhysRevX.13.021018; Hoang, N. H., Mogavero, F., & Laskar, J. (2021). Chaotic diffusion of the fundamental frequencies in the Solar System. Astronomy & Astrophysics (arXiv:2106.00584)..

Terms: NASA/JPL numerical ephemeris data published by JPL Solar System Dynamics and NASA NAIF for unrestricted use; JPL ephemerides are U.S. Government-funded works (JPL is operated by Caltech for NASA). Credit "NASA/JPL-Caltech Solar System Dynamics" and cite the listed references. No NASA/JPL/Caltech endorsement is implied.
Processing (fitting, quantisation, convention resolution, validation) by Vanyx; see manifest.json and tools/build-long-ephemeris.py.
Accuracy statements are relative to JPL DE440/DE441 and Horizons, not to observations. NASA, JPL and Caltech do not endorse Vanyx.