NGC 6539 (GCL 85) Ser - globular cluster
Date: 3.10.2026
Equipment: ZWO Seestar S50
Exposure: 30x10sec
Location: Havlíčkův Brod
Processing: StackingWizard, AstroWizard, Photoshop
Description: NGC 6539 is a globular cluster in the constellation Serpens.