Ephemeris system
JPL Horizons
JPL's online ephemeris service, which generates highly accurate positions, distances, and other quantities for Solar System bodies and spacecraft, for any observer and time. It is the go-to tool for planning observations and checking where a body will be.
Bodies, frames & concepts
Knowledge connections
- Associated withNASA Jet Propulsion Laboratory
- Associated withJPL Development Ephemeris
- Associated withSkyfield
Sources
The primary and reference sources this topic draws on.
- NASA JPLJet Propulsion Laboratory / Solar System Dynamics
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.