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COLLINDER 399
19h 25m +20"10'
Diameter 90'
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| Olympus 2020Z digital camera. 16 second unguided exposure at F2.8, 110mm (35mm camera equivalent), ISO 400. Mounted piggyback on a Celestron Nexstar5. Dark frame subtraction and contrast increase carried out with Paint Shop Pro 6. The dimmest star easily discernable is SAO 104814 at magnitude 8.36 but closer inspection just reveals SAO 104809 at magnitude 8.87 |
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