Finally smokeless, cloudless and moonless sky
last night after about four months. I imaged NGC 206 which a small blue
cluster (at center of image) located at the edge of M31. Capturing and
blending Luminance image with RGB really makes a huge difference as
compared to just processing RGB.
High resolution at: https://peternagy.smugmug.com/Telescopes/Galaxies/i-jQJFt62/A
NGC 206. RGB + Luminance. 0.93"/pixel image scale.
Astrodon I series Red filter, 18 x 4 minutes, 1x1. 10/12/2018.
Astrodon I series Green filter, 18 x 4 minutes, 1x1. 10/12/2018.
Astrodon I series Blue filter, 18 x 4 minutes, 1x1. 10/12/2018.
Astrodon I series Lum filter, 54 x 4 minutes, 1x1. 10/12/2018.
Total 7.2 hours.
TEC 140 APO F/7 with TEC Field Flattener, Astro-Physics A-P1100GTO
GEM with absolute encoders. QSI660wsg. OAG and Ultrastar autoguider
(1.31"/sec), Optec Handy Stepper Motor focuser.
Captured and automated with SGP. Calibration and Post-processed with
PixInsight. PHD2 settings: RA Aggressiveness: 60, RA Hysteresis: 10, Max
RA/Dec Duration: 2000, Min Move: 0.60 (0.8" guide camera), Calibration
Steps: 300msec, Auto/Resist Switching, Auto guiding exposure and extreme