Deep Rosette Nebula
Emission Nebula in Monoceros
Uploaded 2/18/26

 

            
From our dark high altitude
            observatory site in northern Arizona, here is our deepest shot
            yet of the Rosette Nebula in Monoceros and surrounding nebulosity.
            The bright splashy star cluster in the center - NGC2244 is seen
            to contain both blue and golden supergiant stars. Just inside
            the central hole in the nebula and to the lower left is a series
            of white filaments marking the location of a Herbig-Haro object.
            The central higher energy regions of the Rosette are pink due
            to H-beta and OIII excitation. The outer regions and surrounding
            nebulostiy are a deep red in hue as they are more distantly energized
            by the ultra violet of the central star cluster. This shot shows
            a much larger extent than the typical images you commonly see,
            with plenty of dark dusty filaments completing the scene.

            
Technical Data: 11"
            f/2.2 RASA astrograph, ASI6200mm + Baader LRGB filters, Integration
            time = 2h total, Happy Jack, Az.

            
Select an image size for a larger view:

1600 x 1200


Instrument:  RASA 11"  f/2.2
Mount:  Home Made GEM 
Camera: ASI6200 MM + LRGB filters
Guider: ASI mini  w/80mm piggyback refractor
Exposure:  120m ( 5 min subs)
Location:  Happy Jack, Arizona, Elevation:  7000 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 9/10
Outside Temperature:  25 F

Image Processing Tools: 
Maxim DL6:  Calibration
PixInsight:  Alignment, Stacking, Star Removal
Photoshop CS2:  Curves, Color Correction, Cleanup

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