Rosette Nebula and the Monoceros Loop
Emission, Super Nova Remnant
Uploaded 4/16/25

 

            
The Rosette nebula in
            Monoceros is at the very center of this busy field, with the
            composition planned to capture the huge "Monoceros Loop"
            just to its upper left. This SNR, also known as SNR G205.5+0.5
            is rarely imaged due to its faintness and huge size. Just below
            the Rosette is Sharpless 2-280, and several sparkling star clusters
            decorate this field as well. To achive this level of sharpness
            with this lens, you must do two things. First, stop down half
            a stop to f/2.4. Then add a UV/IR blocking filter to clean up
            the out of focus UV.

            
Technical Data: Samyang
            135mm f/2, ASI2600mm + IDAS NBZ filter 1 hour total, Happy Jack,
            Az.

            
Select an image size for a larger view:

1400 x 1200


Instrument:  Samnyang 135mm f/2 @ f/2.4
Mount:  Home Made GEM
Camera:  Color CMOS ASI2600 MC Pro
Guider: ASI mini  w/50mm piggyback refractor
Exposure:  60m ( 5 min subs)
Location:  Happy Jack, Arizona, Elevation:  7000 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 9/10
Outside Temperature:  35 F

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

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