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Imaging camera:ASI1600mm Pro
Mount:Celestron Advanced VX
Guiding telescope or lens:QHYCCD QHYOAG-S
Guiding camera:QHYCCD QHY5II-M
Focal reducer:William Optics Flat6A-II (x0.80)
Astrodon 3nm Ha 31mm: 120x180" (gain: 139.00) -20C bin 1x1
Astrodon 3nm OIII 31mm: 360x120" (gain: 139.00) -20C bin 1x1
Astrodon 3nm SII 31mm: 288x150" (gain: 139.00) -20C bin 1x1
Astrodon E Series Gen II Blue 31mm: 66x60" (gain: 74.00) -20C bin 1x1
Astrodon E Series Gen II Green 31mm: 67x60" (gain: 74.00) -20C bin 1x1
Astrodon E Series Gen II Red 31mm: 70x60" (gain: 74.00) -20C bin 1x1
Integration: 33.4 hours
Avg. Moon age: 15.49 days
Avg. Moon phase: 72.42%
Bortle Dark-Sky Scale: 5.00
Mean SQM: 19.92
Astrometry.net job: 3248591
RA center: 6h 32' 9"
DEC center: +5° 1' 12"
Pixel scale: 2.857 arcsec/pixel
Orientation: 198.534 degrees
Field radius: 1.236
Locations: Backyard, Coppell, Texas, United States; TAS Atoka Dark Site, Atoka, Oklahoma, United States
Data source: Mix of multiple source
First of all, it's HARD to collect S-II and O-III data in the backyard!
12 hours of O-III and 12 hours of S-II data added to the previous HaRGB combination. No doubt that I didn't collect enough. Checking back the HaRGB, the sharpness of the details was not there either. I could blame the bad weather and entry-level equipments. :)
I do need a good mount to boost my courage on collecting data. The result is not that optimal. Only surprise is that the S-II signal added the touch of golden edges here and there. Tried to do the pure narrowband tone mapping and failed miserably. :(
This time I tried something different - I did most of the processing in non-linear state. This includes background level, de-noise in Photoshop and star removal in Straton.
Whatever it is, I will do this target again in the future when I find the "perfect" mount.
Pre-processing of Ha Master
- Calibration / Integration, Astro Pixel Processor
- Dynamic Background Extraction, PixInsight
- ScreenTransferFunction / HistogramTransformation, PixInsight.
- Dfine2, Photoshop
HaS2O3RGB Combination & Post-processing
- NBRGBCombination Script, PixInsight
- Final Touch-up, Photoshop
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