The top-ten are determined approximatively by looking into the SEDS statistics file (which gives the accesses since its about weekly new launch) for the main object page in our Messier database. This is done several times a month to give an approximately good estimation, but this preliminary service does not claim it is not erroneous. I'll probably work out a better tool at some time.
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Most recent Top 10 Messier objects with links to the Top 10 charts for all previous months
Last Modification: 8 Feb 1998