Messier 18 – Open Cluster
93 subs at 5 seconds each – 50 ISO, Bortle 2 – 3
Total Data: 7 minutes
Taken with Celestron Origin using OLV software.
West Taratahi Hall, Chester Rd, Masterton, NZ.
Wednesday 9th September 2026
Stacked and processed in Siril
Messier 18 or M18, also designated NGC 6613 and sometimes known as the Black Swan Cluster, is an open cluster of stars in the constellation Sagittarius.
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