simon fedida
DQL1_Bubble_HaSII Dawn stak_flat_aligned_HaSII biclr cmp#84_C+Ls3_crop2_devlp_dnse2_clrty
Bubble Nebula NGC 7635 in Cassiopeia - SH composite
Distance 7,100 lyrs
Diameter 7 lyrs
Age 4 million years old
Radiation pressure and winds from a bright and hot central star blows away surrounding
gas and dust into a bubble.
Photograph taken in narrowband filters: emission lines from ionised Hydrogen, doubly ionised Sulphur.
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
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)
DQL1_Bubble_HaSII Dawn stak_flat_aligned_HaSII biclr cmp#84_C+Ls3_crop2_devlp_dnse2_clrty
Bubble Nebula NGC 7635 in Cassiopeia - SH composite
Distance 7,100 lyrs
Diameter 7 lyrs
Age 4 million years old
Radiation pressure and winds from a bright and hot central star blows away surrounding
gas and dust into a bubble.
Photograph taken in narrowband filters: emission lines from ionised Hydrogen, doubly ionised Sulphur.
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
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)