Messier 21
- Open Cluster in Sagittarius
Description: Open Cluster in Sagittarius, also known as NGC6531 and Cr363. Magnitude 5.9, 13 arc minutes across containing about 70 stars.
Film: Kodak Gold 400, chilled with dry-ice
Filter: none
Scope: 8" f6 Newtonian
Exposure: 30 Minutes
Location: Coral Pink Sand Dunes, Utah
Date: 21 May 1990
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