Abell 31 Planetary Nebula in Cancer
with NEXUS coma corrector
with 10" f/3.9 Astrograph @ f/2.9
Uploaded 3/20/24

 
This
            is Abell 31 in Cancer, and is a shockingly beautiful nebula in
            the southern part of the constellation near M67. Very faint however,
            requiring over 11 hours of exposure at f/2.8 to get a good image.
            Technical details: GSO 10" + Nexus Coma corrector at f/2.8,
            11hours LRGB, Atik 16200 CCD, Payson Arizona.

            
Select an image size for a larger view:

1400 x 1290


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Nexus 0.75x CC
Mount:  Astrophysics 1200 QMD
CCD Camera:  ATIK 16200 
Guider: ASI290  w/80mm WO Zenithstar 81 piggyback refractor
Exposure:  11 hours HaOIIIRGB
Astronomik  RGB Combine Ratio:  1: .9: 1.6 = G2V  calibrated
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 3 arcsec , Transparency 9/10
Outside Temperature:  35 F
CCD Temperature:  -30 C
Image Processing Tools: 
Maxim DL6:  Calibration, PixInsight:  All Remaining processing, Production finishing: Photoshop CS2

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