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 NGC6520 Open Cluster And B86 

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Did you ever have a day when it felt like a dark cloud was following you around? For the open cluster of stars NGC 6520, every day is like this. On the left of the above picture are many of NGC 6520's bright blue stars. They formed only millions of years ago - much more recently than our ancient Sun which formed billions of years ago. On the bottom is an absorption nebula, molecular cloud Barnard 86, from which the stars of NGC 6520 surely formed. This nebula contains much opaque dust that blocks light from the many stars that would have been visible in the background. Surrounding NGC 6520 is part of the tremendously dense starscape in the bulge of our Milky Way Galaxy, the extended halo of stars that surrounds the center of our Galaxy. NGC 6520 spans about 10 light years and lies about 5500 light years away toward the direction of Sagittarius. . [Text from APOD]

CREDITS Team by John Kasianowicz, Scott Johnson, Rick Stevens, Josh Balsam, Mike Selby, Leonardo Orazi
PROCESSING Mike Selby and Leonardo Orazi
Optics: OS RiDK 400
Mount: 10 Micron GM3000
Camera: FLI PL16803
Filters: Astrodon LRGB
Guiding Systems: Unguided
Dates/Times: July 2019
Location: Chile - El Sauce - Atacama
Exposure Details: L:R:G:B => 180:64:64:64 => (36x5):(8x8):(8x8):(8x8) color Bin2 [num x minutes]
Cooling Details: -30C
Acquisition: TSX, Voyager
Processing: PixInsight, CCDStack2+, PS CC 2019
Mean FWHM: 3.58
SQM-L: ?