Under the Stars with Don

Join Don for a free public star party at Big Bend, California on Saturday, September 4. See the Events page for more info.

Downloads

Download a free copy of Don's book, A Decade of Comets.
(24.5 MB Word document)

Download Don's comet hunting spreadsheet.
(32k Excel document)

Photo of Don at his telescope

Welcome to TheCometHunter.com

A website devoted to the discoveries of world-renowned comet hunter, Don Machholz. Find out how Don found each of his comets, view a dizzying array of cometary photographs, and find info on upcoming astro events with Don himself.


Don Discovers 11th Comet!

On the morning of March 23, after 607 hours of observation since his last discovery, Don Machholz managed to bag his 11th comet, now officially known as C/2010 F4 (Machholz). See the News page for the details on this exciting discovery!