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NGC 7635, Bubble Nebula, HαRRGB (UHC-S), 28 Jul & 8 Aug 2015, David Dearden

NGC 7635, Bubble Nebula, HαRRGB (UHC-S), 28 Jul & 8 Aug 2015

Equipment

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Acquisition details

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Description

onditions were just OK for the RGB part of this image, detailed below

Date: 8 Aug 2015

Subject: NGC 7635, Bubble Nebula

Scope: Astrotech AT8IN

Filter: Baader UHC-S

Mount: CG-5 (Synta motors, PicGoto Simplificado)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.5.0.1 (Win 7 ASCOM)

Camera: DSI IIc no cooling (about 21 °C)

Acquisition: Nebulosity 4.0.2, no dither

Exposure: 16x600 s

Stacking: Neb 4.0.2, bad pixel map, bias included, 33 flats, histogram match, deBayer & square, align, 40-60%tile stack.

Processing: StarTools 1.3.5.289 Crop; Develop: 70.43%; HDRptimize; Color:Scientific, 230%; Deconvolute 6.0 pix; Track 5.9 pix, smoothness 88%; Magic, shrink 1 pix. Photoshop CC 2014 + Carboni Astronomy Tools curves; liquify-pucker on large stars; Astroframe.

HαRRGB combine with 28 Jul 2015 Hα data, layer original extracted stars back on top, unsharp mask with a layer mask to sharpen nebula features.

Comments

Histogram

NGC 7635, Bubble Nebula, HαRRGB (UHC-S), 28 Jul & 8 Aug 2015, David Dearden