NGC 6520 and B86 in Sagittarius
Looking south toward the center of our Milky Way galaxy is the Large Sagittarius Star cloud. In its north is star cluster NGC 6520 and nearby dark nebula Barnard-86 (B86). This cropped image is a joint project of James Foster and me using my Celestron 11-inch SC telescope at f/7. Exposures through filtered ZWO ASI6200MM-Pro monochrome camera were 24, 27, 26 minutes RGB respectively.
file: NGC6520&B86-RGB4A-1d4a-cr2sm.jpg
Click here for full resolution photo

Photographic Data
telescope:
Michael Stecker's Celestron 11-inch (black tube) SCT with Starizona 0.72X reducer/flattener
FL= 2011 mm

mount:
iOptron CEM60

guiding:
Off-axis with ZWO ASI120MM mini camera

imaging camera:
ZWO ASI6200MM-Pro monochrome camera
(cropped image)

exposure:
24, 27, 26 minutes RGB respectively.  Total exposure time: 77 minutes (1.28 hours)

photographic site:
James Foster observatory at Frazier Park California
(Bortle 4 at 5,500 ft elevstion)



Crop 1 of image at top (NGC 6520 & B86)
file: NGC6520&B86-RGB4A-1d4a-cr3asm.jpg
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Crop 2 of image at top (NGC 6520 & B86)
file: NGC6520&B86-RGB4A-1c-crmag1.jpg
Click here for full resolution photo