Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble nebula  ·  NGC 7635  ·  Sh2-162
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NGC 7635, Bubble Nebula, Hα, 28 Jul 2015, David Dearden
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NGC 7635, Bubble Nebula, Hα, 28 Jul 2015

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Description

Good sky conditions. Easy PicGoto find from the end of Cassiopeia. Better than usual guiding performance.

Date: 28 Jul 2015

Subject: NGC 7635, Bubble Nebula

Scope: Astrotech AT8IN

Filter: Baader 7 nm Hα

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: 25x600 s

Stacking: Neb 4.0.2, bad pixel map, bias included, 33 flats, OSC extract R, normalize intensities, square, align, 40-60%tile stack, resize 2x (Catmull-Rom spline).

Processing: StarTools 1.3.5.289 Crop; Wipe 75%; Develop: 81.18%; HDRptimize; Deconvolute 3.0 pix; Track 6.2 pix, smoothness 88%; Magic, shrink 1 pix. Photoshop CC 2014 + Carboni Astronomy Tools curves; liquify-pucker on large stars; Astroframe.

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NGC 7635, Bubble Nebula, Hα, 28 Jul 2015, David Dearden