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Contains:  Witch Head nebula, IC 2118, NGC 1752
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Witch Head Nebula, 





    
        

            Alex
Witch Head Nebula

Witch Head Nebula

Technical card

Imaging telescope or lens:SkyWatcher ED80

Imaging camera:Sony a6300

Mount:iOptron CEM25P

Guiding telescope or lens:SkyWatcher Finder/Guider 9x50

Guiding camera:ZWO ASI120MM-S

Focal reducer:SkyWatcher 0.85x Focal Reducer/Corrector for 80ED

Software:INDI/EkosStarTools Star tools

Resolution: 1989x2976

Dates:Feb. 2, 2019

Frames: 11x600"

Integration: 1.8 hours

Avg. Moon age: 27.41 days

Avg. Moon phase: 5.01%

Astrometry.net job: 2555352

RA center: 76.217 degrees

DEC center: -6.999 degrees

Pixel scale: 3.085 arcsec/pixel

Orientation: 6.443 degrees

Field radius: 1.534 degrees

Locations: Home, Weymouth, Dorset, United Kingdom

Data source: Backyard

Description

I wasn't sure how well this would come out as it's fairly faint compared to the targets I've tried before.

As it's faint and there's no really bright stars in the field of view, I went for 10 minute exposures, which seem to have worked fairly well.
Unfortunately there seems to be a lot of satellites in that part of the sky and a number of the subs had trails.
It didn't seem to matter what settings I used in DSS, I couldn't get rid of all of the trails, so I had to resort to cleaning the last one off using Photoshop.

Equipment:
iOptron CEM25P mount
Skywatcher ED80 DS Pro (510mm Focal Length with 0.85x Reducer/Flattener)
Sony a6300 camera
ZWO ASI 120MM-S Guide Camera
SkyWatcher 9x50 Finder as guide scope
Nanopi M4 running Armbian with KStars and EKOS/INDI for capture and guiding

Acquisition:
Night of the 2nd February 2019
Temperature 3 degrees
11x 600 second dithered lights @ ISO 400 (110 total mins)
10 darks
35 flats
300 bias

Pre-Processing:
dcraw conversion script to ensure no white balancing
Stacked in DSS

Main Image Processing in Star Tools:
Bin 50%
Crop
Wipe
Develop
Deconvolution
Contrast
HDR
Filter
Colour
Life
Wavelet De-Noise
Magic - Star reduction

Photoshop spot healing brush tool to remove a satellite trail

Comments

Author

ajh499
Alex
License: None (All rights reserved)
740
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Witch Head Nebula, 





    
        

            Alex