Preparation(Info)

MPCAT

The following catalogue files are available following the batch ofMinor Planet Circulars dated2025 OCT. 06.

• Minor-planet orbit files
  • Numbered objects
  • Multi-opposition unnumbered objects
  • One-opposition objects (perturbed solutions)
  • One-opposition objects (unperturbed solutions)
  • Complete orbital sets (subsets of the above datafiles) are available forthe following classes of object:
    • Unusual minor planets (including NEOs)
    • Distant minor planets (Centaursand transneptunians)
  • Orbit files incorporating the dailyMPEC updates since the last batch ofMPCsare available.
• Identification files
  • List of identifications and doubledesignations for unnumbered objects
  • List of identifications and doubledesignations for numbered objects
• Complete observation files are available usingMPCAT-OBS.

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Information on the format of theorbits is available.