NGC 6905
APOD GrAG Photo Of The Day 3 October 2020 apod.grag.org/2020/10/03/ngc-6905-blue-flash-nebula/
NGC 6905 is a small, bright planetary nebula in the constellation Delphinus. It is estimated to be around 7,500 light years from Earth.
TARGET
Nomenclature: NGC 6905, Blue Flash Nebula
Right Ascension: 20:22:23
Declination:  +20:06:16
Size: 44 arc sec
Discovery: William Herschel in 1747
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
Astrodon 5nm H-Alpha filter: 58x900" bin 1x1
Astrodon Blue: 10x300" bin 1x1
Astrodon Green: 10x300" bin 1x1
Astrodon Lum: 28x300" and 24x120" bin 1x1
Astrodon OIII 3 nm: 141x300" bin 1x1
Astrodon Red: 11x300" bin 1x1
Total Integration: 32.3 hours
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.118 degrees
Capture dates: 15 August - 10 September 2020
Capture location:  Fregenal de la Sierra, Spain

IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2