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NGC 6520 + B 86 (Ink Spot) | by steschu
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NGC 6520 + B 86 (Ink Spot)

B86, the Ink Spot, is a Dark Nebula in Sagittarius that obscures the light from the background stars of the milky way. On the left lies the Open Cluster NGC 6520.

 

Object: NGC 6520 + Barnard 86 (Ink Spot)

Optics: Lacerta Newton 12" F4 + 3" Wynne-Corrector

Mount: Skywatcher EQ8

Camera: ZWO ASI 183MM Pro @-20°C, Gain=53, Offset=10

Filter: ZWO EFW 7x36mm, ZWO 36mm Filters

Exposure: total ~1.3h, R 20x60sec, G 20x60sec, B 20x60sec, L 40x60sec, L (derived from RGB), 200 Bias, 40 Darks, 40 Flats per channel

Date: 2018-07-13

Location: ATHOS Centro Astronómico S.L., La Palma

Capture: Sequence Generator Pro

Guiding: Off-Axis, ASI120MM, PHD2

Image Acquisition: Stephan Schurig

Image Processing: Stephan Schurig

AstroPixelProcessor 1.062: Calibration, Registration, Normalization, Integration, Channel Combination, Background Calibration, Auto Digital Development

Photoshop 19.1.5: Curves, Masked Dynamic (Saturation), Cosmetic Star Repair, Shadows/Highlights, Curves, Masked Dynamic (Saturation), Nik Output Sharpener

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Taken on July 13, 2018