IC 1396, Elephant Trunk Nebula, HαRRGB, 16 Jul & 28 Aug 2015 (David Dearden)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

IC 1396, Elephant Trunk Nebula, HαRRGB, 16 Jul & 28 Aug 2015

Hα Data:

Full Moon, some wind pushing the scope around, marginal guiding but reasonably clear. First attempt processing using StarTools 1.4 (64-bit Mac).

Date: 28 Aug 2015

Subject: IC 1396, Elephant Trunk Nebula

Scope: AT8IN + Antares 0.5x Telereducer

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 chiller CCD 24-26 °C

Acquisition: Nebulosity 4.0.2, no dither

Exposure: 28x600 s

Stacking: Neb 4, bad pixel map, bias included, extract R, match histograms, square, trans+rot align, DSS 2x drizzle 1.75 κ-σ stack.

Processing: StarTools 1.4.305 Crop; Develop 67.2%; HDR Optimize soft; Deconvolute 6.3 pix; Track 7.9 pix, Smoothness 88%; Magic:Shrink 2 pix. CS6 Astronomy Tools Astro Frame.

HαRRGB combination of 16 Jul 2015 and 28 Aug 2015 data.

B revision: HαRRGB combination of 16 Jul 2015 and 28 Aug 2015 data. More selective (85% of frames) stack of Hα data and a little different (better?) color blending; some selective contrast enhancement and less denoising; some star shrinking.

Original
Final
B

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Status	Basic failed
Started	...
Astrometry.net job	4821098
PixInsight job	n/a
PixInsight queue size	n/a
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IC 1396, Elephant Trunk Nebula, HαRRGB, 16 Jul & 28 Aug 2015

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IC 1396, Elephant Trunk Nebula, HαRRGB, 16 Jul & 28 Aug 2015

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