Abell 21 - The Medusa Nebula
Planetary Neubla in Gemini
Uploaded 6/7/24

 
This
            unusual planetary nebula in Gemini shows some extra detail in
            long exposures as seen here. Not just a pink jelly fish shaped
            bubble, but also the teal colored OIII and red Hydrogen can be
            seen escaping more rapidly on the lower right corner. This feature
            is almost never recorded in amateur images. 

            Technical Details: 8" f/2 RASA, ASI071MC Pro CMOS, 1h 20m
            total integration time, Happy Jack Arizona.

            
Select an image size for a larger view:

1400 x 1200


Instrument:  RASA 8" f/2
Mount:  Home Made GEM
Camera:  Color CMOS OSC
Guider: ASI mini  w/80mm piggyback refractor
Exposure:  80m ( 5 min subs)
Location:  Happy Jack, Arizona, Elevation:  7000 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 7/10
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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