Question: What was Alan Hale's best known co-discovery formally designated as? 
Sentence (from "Great Comet of 1811"): The Great Comet of 1811, formally designated C/1811 F1, is a comet that was visible to the naked eye for around 260 days, a record it held until the appearance of Comet Hale–Bopp in 1997.
Relevant evidence: No