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
Contains:  NGC 2239, NGC 2244, NGC 2252, Rosette nebula, The star 12Mon
Getting plate-solving status, please wait...
HaS2O3RGB - Rosette Nebula, 


            Min Xie
HaS2O3RGB - Rosette Nebula
Powered byPixInsight

HaS2O3RGB - Rosette Nebula

Technical card

Dates:Nov. 17, 2018Nov. 20, 2018Nov. 26, 2018Nov. 30, 2018

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

Darks: ~30

Flats: ~30

Bias: ~80

Avg. Moon age: 15.49 days

Avg. Moon phase: 72.42%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 19.92

Temperature: 5.50

Basic astrometry details 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 degrees

Resolution: 2560x1775

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
- Straton

HaS2O3RGB Combination & Post-processing

- NBRGBCombination Script, PixInsight
- Final Touch-up, Photoshop



Min Xie
License: Attribution-NonCommercial Creative Commons


  • Final
    HaS2O3RGB - Rosette Nebula, 


            Min Xie
  • HaS2O3RGB - Rosette Nebula, 


            Min Xie
  • HaS2O3RGB - Rosette Nebula, 


            Min Xie
  • HaS2O3RGB - Rosette Nebula, 


            Min Xie


Description:Starless Ha Master...


Description:Starless S-II Master...


Description:Starless O-III Master...

Sky plot

Sky plot


HaS2O3RGB - Rosette Nebula, 


            Min Xie