Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Getting plate-solving status, please wait...

Technical card

Imaging telescopes or lenses: QHYCCD PoleMaster  ·  Takahashi FSQ-85EDP

Imaging cameras: ASI1600mm Pro

Mounts: Astro-Physics Mach1GTO CP3

Guiding telescopes or lenses: QHYCCD QHYOAG-M

Guiding cameras: QHYCCD QHY5II-M

Focal reducers: Takahashi Flattener 1.01x

Software: ProDigital Software StarSpikes Pro 4  ·  StarNet++  ·  Adobe Lightroom Classic 2019  ·  Adobe Photoshop 2019 CC  ·  Astro Pixel Processor  ·  Sequence Generator Pro  ·  PixInsight 1.8 Ripley

Filters: Astrodon 3nm SII 31mm  ·  Astrodon 3nm OIII 31mm  ·  Astrodon 3nm Ha 31mm  ·  Astrodon E Series Gen II Blue 31mm  ·  Astrodon E Series Gen II Red 31mm  ·  Astrodon E Series Gen II Green 31mm

Accessory: PrimaLuceLab Sesto Senso Robotic Focusing Motor  ·  ZWO EFW  ·  Kingdel NC860 (i7-8550U)


Dates:July 15, 2019July 16, 2019July 17, 2019July 18, 2019July 19, 2019July 20, 2019July 21, 2019

Frames:
Astrodon 3nm Ha 31mm: 60x300" (gain: 139.00) -10C bin 1x1
Astrodon 3nm OIII 31mm: 72x300" (gain: 74.00) -10C bin 1x1
Astrodon 3nm SII 31mm: 72x300" (gain: 139.00) -10C bin 1x1
Astrodon E Series Gen II Blue 31mm: 120x30" (gain: 74.00) -10C bin 1x1
Astrodon E Series Gen II Green 31mm: 120x30" (gain: 74.00) -10C bin 1x1
Astrodon E Series Gen II Red 31mm: 120x30" (gain: 74.00) -10C bin 1x1

Integration: 20.0 hours

Darks: ~40

Flats: ~40

Bias: ~60

Avg. Moon age: 16.22 days

Avg. Moon phase: 94.11%

Bortle Dark-Sky Scale: 9.00

Mean SQM: 18.00

Temperature: 31.00


Basic astrometry details

Astrometry.net job: 3836995


Resolution: 1271x1492

Locations: Backyard, Coppell, Texas, United States

Data source: Backyard

Description

This is an "All-Backyard" project - all data from my bortle class 9 backyard under the moon, including Ha, S-II, O-III and R/G/B star layers. It took 7 nights to collect all the data for this project. It's quite unusual - one whole week with clear night sky. Right after I failed miserably trying to capture some data for the SH2-129/Ou4. Now I do admit that some targets are not practical for backyarders.

Learned quite a lot from imaging and processing the RGB stars. Intentionally, the stars are decreased a lot to expose more nebulosity. Three versions are made and uploaded - star spikes, no spikes and no stars. Don't know why one is better.

Comments are welcome!
Thinking about Western Veil as the next target.

Pre-processing of Narrowband Masters

- Calibration / Integration, Astro Pixel Processor
- Deconvolution, PixInsight (Only for H-Alpha)
- MultiscaleLinearTransformation (Denoise), PixInsight
- ScreenTransferFunction / HistogramTransformation, PixInsight.

Pre-processing of RGB Masters

- Calibration / Integration, Astro Pixel Processor
- Dynamic Background Extraction, PixInsight
- MorphologicalTransformation, PixInsight
- ScreenTransferFunction / HistogramTransformation, PixInsight.

RGB Combination

- LRGBCombination, PixInsight
- MorphologicalTransformation, PixInsight
- ScreenTransferFunction / HistogramTransformation, PixInsight.

Narrowband Combination

- PixelMath, PixInsight
- ScreenTransferFunction / HistogramTransformation, PixInsight.

Narrband & RGB Combination
- Star adjustment, Lightroom
- Final Touch-up, Photoshop

Comments

Author

mxcoppell
Min Xie
Like

Revisions

B

Description:Less spikes...

C

Description:Starless...

D

Description: Shortlisted in Insight Investment Astronomy Photographer of the Year 2020 - Stars and Nebula - Royal Museums Greenwich

Sky plot

Sky plot

Histogram

Dark Molecular Cloud in NGC 7000, 



    
        

            Min Xie