• Processing (Info)

  • MPCAT-OBS: Observation Archive

    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 sizes are for the uncompressed versions and the files are complete through the 2015 JULY 2 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 2015 JUNE 28) are now available. The sizes of the files will be comparable to the sizes listed above but (obviously) somewhat bigger.
    • MD5 checksums
      • Monthly numbered minor planets : 99197649532a5e95bb60021f003856a9
      • Monthly unnumbered minor planets : a3bfef7bf35fde0aea6716c8ec33458f
      • Monthly comets : a05a0dbd606db25f75c35ecf4f7cfa95
      • Monthly natural satellites : ec102d1bc49b3cc3e4a603fff6ed1492
      • Mid-monthly numbered minor planets : c78c952bda4f29ba89341a5d8c26501a
      • Mid-monthly umnumbered minor planets : 16e4845617d76413ca5d387ae98e279c
    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 File of One-Night Stands

    The file of observations of one-night stands can be download from here. Please ensure you have read this document.