The Ring-Moon Systems Node of NASA's Planetary Data System is devoted to archiving, cataloging, and distributing scientific data sets relevant to planetary ring systems.

OPUS Data Search

OPUS - Our Data Search Tool

  • The OPUS API can be accessed directly. See instructions in the OPUS API Guide.
  • Supports surface searches for the planet, satellites and rings (e.g., latitudes & longitudes).

  • Uses comprehensive target lists for Cassini ISS & VIMS.

  • Provides numerous viewing, illumination, spacecraft and instrument constraints.

Enhanced Cassini Support

Visit our Enhanced Cassini Support page for links to:

  • downloadable tables of enhanced geometric metadata,

  • preview products and the keys to their interpretation,

  • calibrated ISS images for the Jupiter & Saturn encounters,

  • new or updated data user’s guides - CIRS, ISS, RSS, & UVIS,

  • PDS’s consolidated Cassini Archive Page.

Our generic Ephemeris Tools now work for any year between 1601 and 2599.
Galileo and Moon Tracker

Click the image (pdf) to see Galileo's observations from January 21 & 22, 1610 and the results from the Moon Tracker and Planet Viewer.

ROSES 2017 Proposal Support
  • Our Research Proposal Support pages provide information and links to data for ROSES 2017 programs relevant to the Planetary Ring-Moon Systems Node. They also provide links to support pages for ROSES calls for previous years.
Ephemeris Tool Updates
  • New, March 2017, the generic Ephemeris Tools have been updated to support any year between 1601 and 2599
  • The Pluto Viewer and Pluto Ephemeris Generator tools are now available.

  • The Cassini ephemeris now in use is the final selection for the remainder of the Saturn tour.
  • The small moon S/2004 N 1 is now available in all the Neptune tools.