MPCAT-OBS: Observation Archive (original) (raw)

The links below provide access to complete observational sets for numbered and unnumbered minor planets and comets. Due to the size of the files, they are available only in gzip-compressed form.

You are reminded that any use of these data, or of data derived from these data, requires you to maintain the reference information on any redistribution.

The file are complete through the 2024 JUL. 14 batch of Minor Planet Circulars. The gzip-compressed versions of the data files are roughly 20% of the size of the uncompressed data files.

• Numbered minor planets
• Unnumbered minor planets
• Comets
• Natural outer irregular satellites of the giant planets
• Minor-planet observation files updated through the most recent mid-month MPS batch (dated 20240910) are now available. The sizes of the files will be comparable to the sizes listed above but somewhat bigger.
  • Numbered minor planets
  • Unnumbered minor planets
• MD5 checksums
  • Monthly numbered minor planets : 0b9eaecf8d4699897ff9c96851099d63
  • Monthly unnumbered minor planets : 210d59630d66fa488fab1c95a3d7389b
  • Monthly comets : 3bd37593864090b7c6e1f8558d572b49
  • Monthly natural satellites : 779baec62ef02835dbe185215648d78e
  • Mid-monthly numbered minor planets : 4b042f32946d9308ec0939248fadd2e4
  • Mid-monthly umnumbered minor planets : 89acac8d16d566a0bc86106be9d1b713

Note that you should ensure that you have set your browser to download to your local disk before trying to access these files. If you fail to do this, your browser will attempt to display the downloaded file. Or more likely, your browser will crash...

The Isolated Tracklet File

The Isolated Tracklet File containing Isolated Tracklets can be downloadedfrom here. Please ensure you have read thisdocument.