What specific, modern-day milestone involves the 110 objects Messier cataloged?

Answer

Successfully locating and logging all 110 Messier objects.

Today, Messier's catalog has shifted from being a technical aid for comet hunters to a structured goal for modern amateur astronomers. Locating and logging every single one of the 110 objects listed in the Messier Catalogue has become recognized as a significant milestone, often considered a rite of passage for dedicated hobbyists. This contrasts sharply with Messier's original ambition, which was focused on capturing fleeting comets rather than systematically charting these secondary, fixed deep-sky targets.

What specific, modern-day milestone involves the 110 objects Messier cataloged?
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