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What to do if you cannot download or update the MPCOrb database through Astrometrica

It may sometimes be difficult to download or update the MPCOrb database through Astrometrica. If you keep getting the error:

Connection to Host cfa-ftp.harvard.edu failed: Connection Closed Gracefully
it is probably easiest to download these files manually and place them in the correct directory for your installation. To do this, visit:
http://www.astro.cz/mpcorb
and download (right-click, Save Target As...) the following files: MPCORB.dat and COMET.dat. Replace the MPCORB.dat and COMET.dat files in your Astrometrica » MPCORB directory.

The only problem with this technique is that you will be downloading the entire MPCORB.dat file (~65Mb) each time. However, the file you download will be the most up to date (so no need to do an update MPCOrb). It is recommended that you make a fresh download of these files just before you start to analyse your data.

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