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Contains:  NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
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Rosette Nebula (Ha + O3 + RGB), 


            Scott Davis
Rosette Nebula (Ha + O3 + RGB)

Rosette Nebula (Ha + O3 + RGB)

Technical card

Resolution: 1528x1188

Dates:Dec. 31, 2013Feb. 23, 2016Feb. 24, 2016Feb. 25, 2016Feb. 27, 2016

Astrodon 31mm Ha 3nm FWHM: 19x1200" -20C bin 1x1
Astrodon 31mm OIII 3nm FWHM: 29x1200" -20C bin 1x1
One-Shot Color: 59x180" ISO1600

Integration: 18.9 hours

Darks: ~28

Flats: ~32

Flat darks: ~32

Bias: ~32

Avg. Moon age: 19.30 days

Avg. Moon phase: 74.38%

Bortle Dark-Sky Scale: 6.20 job: 982299

RA center: 97.980 degrees

DEC center: 4.954 degrees

Pixel scale: 3.025 arcsec/pixel

Orientation: -90.416 degrees

Field radius: 0.813 degrees

Locations: My Backyard, Clovis, California, United States; Ahwahnee Hills Observatory, Ahwahnee, California, United States


This is my first experiment in combining data captured using my new CCD camera setup with data captured using my old DSLR.

RGB data was captured using my Canon T3i and a 200mm lens. Narrowband data was captured using my ES 102 f/7 Refractor (714mm focal length) and my QSI 683 CCD camera.



Scott Davis
License: Attribution-NonCommercial-NoDerivs Creative Commons


  • Final
    Rosette Nebula (Ha + O3 + RGB), 


            Scott Davis
  • Rosette Nebula (Ha + O3 + RGB), 


            Scott Davis

Sky plot

Sky plot


Rosette Nebula (Ha + O3 + RGB), 


            Scott Davis