Stephan's Quintet and the Deer Lick Galaxy Group, UHC-S, 8 Sep 2015 (David Dearden)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7317 · NGC 7318 · NGC 7319 · NGC 7320 · NGC 7331 · NGC 7335 · NGC 7337 · Stephan's Quintet

Stephan's Quintet and the Deer Lick Galaxy Group, UHC-S, 8 Sep 2015, David Dearden

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Stephan's Quintet and the Deer Lick Galaxy Group, UHC-S, 8 Sep 2015

Wanted to get Stephan's Quintet and the Deer Lick Group in the same frame, and go as deep as I could with 600 s subframes. Good conditions save for some smoke in the air from the nearby Deer Creek fire. Synched from β Peg and the PicGoto put me right on target. Imaged up to the meridian, did a flip, resynched and reacquired, and imaged until dawn. Guiding performance was rather poor, and worse after the meridian flip. Colors came out more blue/purple than expected.

Date: 8 Sep 2015

Subject: NGC 7331, Deer Lick Galaxy & environs, including Stephan’s Quintet

Scope: AT8IN + Antares 0.5x Telereducer

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 chiller CCD 19 °C

Acquisition: Nebulosity 4.0.2, no dither

Exposure: 41x600 s

Stacking: Neb 4, bad pixel map, bias included, 66 flats, OSC neb filter, match histograms, square, trans+rot align, DSS 2x drizzle 1.75 κ-σ stack.

Processing: StarTools 1.4.305 Crop; Wipe 75%; Develop 83.03%; HDR optimize; Color: scientific, 200%; Deconvolute 5.0 pix; Life: moderate; Track 6.8 pix, Smoothness 89%; Magic: shrink 2 pixels. CS6 Astronomy Tools layer masked levels; layer masked less crunchy more fuzzy; Astroframe.

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Status	Advanced failed
Started	...
Astrometry.net job	767676
PixInsight job	9XG3FNNHD2X1AB6H3C3EXHLYKZ9STGMA
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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Stephan's Quintet and the Deer Lick Galaxy Group, UHC-S, 8 Sep 2015

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