MPCATThe following catalogue files are available following the batch of Minor Planet Circulars dated 2021 SEP. 20 .
- 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 for
the following classes of object:
- Unusual minor planets (including NEOs)
- Distant minor planets (Centaurs and transneptunians)
- Orbit files incorporating the daily MPEC updates since the last batch of MPCs are available.
- Identification files
- Complete observation files are available using MPCAT-OBS.
Information on the format of the orbits is available.