Bubble Nebula SHO composite

[windjammer]

Narrowband image of NGC 7635, Bubble Nebula

Ha 2x2 bin - 16x600s (East side) + 600sx5 (West side) = 3.5hrs, 8-9 October 2022
SII 2x2 bin - 11x600s = 1.8hrs, 10-11 October 2022
OIII 2x2 bin - 20x600s = 3.3 hrs, 17-18 October 2022

Rig:
Imaging scope: SW Startravel 150mm F5, 2.5x Celetron Luminos 2inch imaging barlow, Atik 460EX mono

Guide scope: SW Evostar 90mm F10, with guiding XY stage, ZWO 120MM camera

Guiding: 2 stage PHD: high frequency guide scope (mount tracking) and low frequency OAG image train guiding (guidescope flex)

Mount: Home made German Equatorial pillow block mount, permanently rooftop mounted.  Spring loaded DEC axis gearing.

Other gadgets: ST4 based anti vibration shutter, ST4 based PEC

Processing:
PixInsight: Lights, Darks, Flats, Biases, Align Calibration, StarNet2 star removal/star layer
GradXpert: Gradient removal
Topaz DeNoise AI: Noise removal
Affinity Photo: 32 bit image processing (curves, high pass masking, selective colour)

Simon