+ View the NASA Portal
+ Center for Near-Earth Object Studies IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.
Please visit this page for more details.
Quick Links Planets Planetary Satellites Comets Asteroids Meteor Streams Solar System Bodies
Solar system bodies are divided into the following groups:
- Planetary Satellites (a.k.a. moons)
- Comets (for example "1P/Halley")
- Asteroids (for example "1 Ceres")
- Meteor Streams (for example "Geminids")
Data for each group of bodies is represented slightly differently, but in general, the following are available for all bodies: ephemerides, orbital elements, and discovery data (see the subsections below). Additional data may be available only for a specific body group, for example, orbit diagrams are available only for planets, asteroids, and comets. The exception is meteor streams for which there is only limited data.
In general, orbital elements should not be used to compute ephemerides. This is particularly true for planetary satellites. Use the ephemeris section links above if you need ephemerides.
- Planets (elements used to approximate positions)
- Planetary Satellites (mean elements)
- Comets and Asteroids (osculating elements)
Orbit diagrams are available for the planets, comets, and asteroids.
Discovery circumstances are available for most planetary satellites, select comets, and numbered asteroids. These data include the discovery date, location of discovery, and one or more names credited with the discovery.2020-Jun-04 17:15 UT
(server date/time) Site Manager: Ryan S. Park Webmaster: Alan B. Chamberlin