2022-10-04: NGC7293 the Helix Nebula

I imaged NGC7293, the Helix Nebula, over six nights from September 18 to October 2, 2022 through a 200 mm aperture, 730 mm focal length F/3.65 Boren-Simon PowerNewton Astrograph with 0.73x focal reducer and coma corrector. The imaging camera was a QSI683wsg-8 with Astrodon II filters and cooled to -15C, with off-axis guiding. The system was mounted on a Losmandy G11G2 equatorial head on a permanent pier. The system was controlled with Sequence Generator Pro and PHD2 and the image was processed in PixInsight.

Narrow band Ha, O3, S2: 15 frames x 15 minutes binned 1x1; R, G, B: 7 frames x 5 minutes binned 2x2. 13 hours total exposure time.

I combined the narrow band and RGB data using the NBRGBCombination script. The Red channel was 90% Ha + 10% Sii. The green channel was 90% O3 and 10% Sii. The Blue channel was 100% O3.

The images were taken at the Buford Mountain Conservation Area, Missouri.