NGC 7320, Stephan's Quintet, 14 Sep 2012 (David Dearden)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7317 · NGC 7318 · NGC 7319 · NGC 7320

NGC 7320, Stephan's Quintet, 14 Sep 2012, David Dearden

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NGC 7320, Stephan's Quintet, 14 Sep 2012

Stephan's Quintet was near the zenith when I started, so I had a hard time finding it because I couldn't get my old body and old eyes into the right position. But finally I matched a little asterism in my guide scope with the AstroPlanner map and I walked my way to the target. 5 s exposures were enough to see faint fuzzies in the DSI IIc image. The chiller is not working tonight so I have a noisy 19 °C CCD. Some wind gusts. Finally high clouds came in and ended the session prematurely. And I was getting round stars for this one!

Date: 14 Sep 2012

Subject: NGC 7320, Stephan’s Quintet

Scope: AT8IN+High Point Scientific Coma Corrector

Filter: None

Mount: CG-5 (Synta motors)

Guiding: Orion ST80 + 0.5x Antares telereducer + DSI Ic + PHD

Camera: DSI IIc (not cooled)

Acquisition: Nebulosity 3.1.1

Exposure: 25 x 300 s

Stacking: Neb 3, bias included, normalize first, trans+rot align, 1.5 SD stack

Processing: Digital development with moderate sharpening, heavy Keller stretch, power stretch, saturation boost in Neb 3; CS6 Astronomy Tools color blotch, deep space noise reduction, star color enhance, levels & curves.

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Status	Basic success
Started	...
Astrometry.net job	6439215
PixInsight job	n/a
PixInsight queue size	n/a
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NGC 7320, Stephan's Quintet, 14 Sep 2012

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