NGC1491 in Perseus - The Fossil Footprint Nebula
Emission nebula shaped like a Mammal like reptile footprint
Uploaded 1/18/21

 
Unique
            shaped nebula required a long exposure to bring up the faint
            outer nebulosity. Consisting of an inner pink glow in the outline
            of a tetrapod foot, and surrounded by a deep red pure hydrogen
            cloud.

            
Select an image size for a larger view:

1400 x 1200


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
Camera:  ZWO ASI071MC Pro Color CMOS
Guider: ZWO ASI mini  w/80mm piggyback refractor
Exposure:  4 hours Total Exposure time HaRGB
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 9/10
Outside Temperature:  35 F

Image Processing Tools: 
Maxim DL6:  Calibration, Color Conversion, aligning, stacking
PixInsight:  Saturation Curves
Photoshop CS2:  Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup

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