JPL Horizons On-Line Ephemeris System
Lua error in package.lua at line 80: module 'strict' not found. JPL Horizons On-Line Ephemeris System provides easy access to key Solar System data and flexible production of highly accurate ephemerides for Solar System objects.
Osculating elements at a given epoch are always an approximation to an object's orbit (i.e. an unperturbed conic orbit or a "two-body" orbit). The real orbit (or the best approximation to such) considers perturbations by all planets, a few of the larger asteroids, a few other physical usually small forces, and requires numerical integration.
Jet Propulsion Laboratory (JPL) ephemerides do not use things such as periods, eccentricities, etc.[1] Instead, JPL integrates the equations of motion in Cartesian coordinates (x,y,z), and adjusts the initial conditions in order to fit modern, highly accurate measurements of planetary positions.[1]
As of August 2015, Horizons now uses ephemeris DE431.[2]
Introduction
There are 3 ways to use the system:
References
External links
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This astronomy-related article is a stub. You can help Wikipedia by expanding it. |
