There are three groups: Easy (58), Tougher (23), Challenging
(21).
Fifty objects are needed to get the certificate. You
may choose any
combination from all three lists. You can print all
12 monthly
list from the archives used for the regular Messier
list.
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II. Tougher Messier Objects:
1,9,33,49,51,54,56,60,61,63,64,65,66,68,75,77,83,87,97,101,
102,104,106.
III. Challenging Messier Objects:
20,58,59,69,70,72,84,85,86,88,89,90,95,96,99,100,105,107,
108,109,110.