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Contains:  NGC 2239, NGC 2244, NGC 2252, Rosette nebula, The star 12Mon
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The Flaming Rose - HaRGB - NGC 2237 (Rosette Nebula), 



    
        

            Min Xie
The Flaming Rose - HaRGB - NGC 2237 (Rosette Nebula)
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The Flaming Rose - HaRGB - NGC 2237 (Rosette Nebula)

Technical card

Imaging telescopes or lenses: William Optics Gran Turismo 81 APO (2018)  ·  William Optics Camera Angle Rotator  ·  Celestron StarSense

Imaging cameras: ASI1600mm Pro

Mounts: Celestron Advanced VX

Guiding telescopes or lenses: QHYCCD QHYOAG-S

Guiding cameras: QHYCCD QHY5II-M

Focal reducers: William Optics Flat6A-II (x0.80)

Software: ProDigital Software StarSpikes Pro 4  ·  Adobe Photoshop CC 2016  ·  Astro Pixel Processor  ·  Sequence Generator Pro  ·  PixInsight 1.8 Ripley  ·  Adobe Lightroom 2017

Filters: 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  ·  Celestron SkySync GPS  ·  Kingdel NC860 (i7-8550U)


Dates:Nov. 17, 2018Nov. 20, 2018

Frames:
Astrodon 3nm Ha 31mm: 120x180" (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: 9.4 hours

Darks: ~30

Flats: ~30

Bias: ~80

Avg. Moon age: 10.50 days

Avg. Moon phase: 79.38%

Bortle Dark-Sky Scale: 4.50

Mean SQM: 20.89

Temperature: 6.50


Basic astrometry details

Astrometry.net job: 3248380

RA center: 6h 32' 22"

DEC center: +5° 3' 46"

Pixel scale: 3.109 arcsec/pixel

Orientation: 197.950 degrees

Field radius: 1.189 degrees


Resolution: 2240x1600

Locations: Backyard, Coppell, Texas, United States

Data source: Traveller

Description

Rosette Nebula is always on the top of my target list. The vibrant color layers and sophisticated details have too much temptation. I have two plans for the Rosette this winter - HaRGB and pure narrowband. I believe 6 hours of Ha from city light pollution is good enough. There is not much de-noise needs to be done for the Ha master.

The 5 hours RGB data was captured from the trip to Atoka last weekend. The moon set when the Rosette RGB sequence started. Got the blessing everything went well. And finally, I had all the data for HaRGB version ready.

Indeed, I appreciate the true color from RGB. Will make some dramatic version in the next pure narrowband version.

So here it is. Hope you like it.
(I am not sure about the version with minimal star spikes, or the original star version. Tough call...)

Happy Thanksgiving 2018!

Pre-processing of Ha Master

- Calibration / Integration, Astro Pixel Processor
- Dynamic Background Extraction, PixInsight
- Deconvolution, PixInsight
- MultiscaleLinearTransformation (Denoise), PixInsight
- ScreenTransferFunction / HistogramTransformation, PixInsight.

Pre-processing of RGB Masters

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

HaRGB Combination & Post-processing

- LRGBCombination (Ha master as the Lum), PixInsight
- Final Touch-up, Photoshop

Comments

Author

mxcoppell
Min Xie
License: Attribution-NonCommercial Creative Commons
4534
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The Flaming Rose - HaRGB - NGC 2237 (Rosette Nebula), 



    
        

            Min Xie