The Ultimate Messier Object Log (TUMOL) is a FileMaker database that contains relevant information for all 110 Messier objects. It contains various layouts to assist amateur astronomers in documenting their search for deep sky objects.

This tool tries to include everything an amateur astronomer might want to see regarding Messier Objects: pictures, astronomical coordinates, space for notes and viewing comments, descriptions, etc. It is sortable, printable, and customizable by you, the user. It is one of the most useful tools you will encounter to assist you in searching for and viewing Messier Objects.