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The International Astronomical Union Minor Planet Center
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MPCAT
The following catalogue files are available following the batch of
Minor 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 daily
MPEC
updates since the last batch of
MPCs
are available
.
Identification files
List of identifications and doubledesignations for unnumbered objects
List of identifications and doubledesignations for numbered objects
Complete observation files are available using
MPCAT-OBS
.
Information on the format of the
orbits
is available.