JPL Horizons(glossary entry)
An ephemeris service provided by the Jet Propulsion Laboratory. This is the definitive source of information about the Moon's location and orientation in space as viewed from any position in the solar system.
- Horizons website
- In addition to the lunar ephemeris, Horizons provides similar information for all major and many minor solar system bodies.
- Since the preceding document was prepared, a Tutorial has appeared on the Horizons website giving clearer details of how to use the ephemeris, including targeting specific features on the Moon.