Galaxies - PeterNagy
NGC7331 Deer Lick and Stephan's Quintet

NGC7331 Deer Lick and Stephan's Quintet

NGC7331 Deer Lick and Stephan's Quintet. RGB + pseudo-Luminance. 0.96"/pixel image scale.

Astrodon Red filter, 18 x 7 minutes, 1x1. 9/19/2015.
Astrodon Green filter, 18 x 7 minutes, 1x1. 9/19/2015.
Astrodon Blue filter, 18 x 7 minutes, 1x1. 9/19/2015.

TEC 140 APO F/7 with Astro-Physics A-P1100GTO GEM. QSI660wsg. OAG and Ultrastar autoguider, Optec Handy Stepper Motor focuser.

Captured and automated with SGP. Calibration (including Dark Subtraction) and Post-processed with PixInsight. PHD2 settings: RA Aggressiveness: 60, RA Hysteresis: 10, Max RA/Dec Duration: 2000, Min Move: 0.45, Calibration Steps: 350msec, Auto/Resist Switching, Extreme dithering and Settled at <1.0, 3.5 sec guiding exposure.