Cone Nebula, HαRRGB, 24-25 Feb 2016 (David Dearden)

Cone Nebula, HαRRGB, 24-25 Feb 2016

HαRRGB combination of aligned 24 Feb Hα and 25 Feb UHC-S RGB data. 50% Hα with 50% R as both R channel and luminance. I experimented with higher amounts of Hα to keep the noise down a little, but I think this looks better.

Color data to add to my Hα. Got a late start and there is still a good deal of Moon, but everything seemed to work pretty well and guiding was good even though there is quite a lot of evidence of differential flexure.

Date: 25 Feb 2016

Subject: Cone Nebula

Scope: AT8IN

Filter: Baader Planetarium UHC-S

Mount: EQ-6 (EQMOD)

Guiding: Orion ST-80 + Antares 0.5x focal reducer + DSI Ic + PHD 2.6.1.1 (Win 7 ASCOM)

Camera: DSI IIc, no chiller CCD 1-2 °C

Acquisition: Sequence Generator Pro 2.4.3.25 with Nebulosity 4.0.4 ASCOM camera driver

Exposure: 17x600 s

Stacking: Neb 4, bad pixel map, bias included, 32 flats, CMYG nebula filter, match histograms, trans+rot align, Nebulosity 40-60tile stack, Resize Catmull-Rom 2x.

Processing: StarTools 1.4.305: Crop; Wipe; Develop: 81.20%; HDR

ptimize; Color:Scientific, 200% saturation; Deconvolute: 2.7 pix; Life:Moderate; Track: Smoothness 87%, 4.5 pix; Magic, shrink 2 pix. Photoshop CS6 + Astronomy Tools: deep space noise reduction; Liquify:pucker to reduce stars; local contrast enhancement.

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Status	Basic failed
Started	...
Astrometry.net job	980823
PixInsight job	n/a
PixInsight queue size	n/a
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