M24, Barnard 92, 93
Rich Milky Way field in Sagittarius
Uploaded 9/6/21

 

            
One of the riches Milky
            Way fields, the composition you see here was planned to include
            both dark nebula and M24. Sky in Happy Jack not quite as dark
            during the monsoon due to air moisture, but this night did still
            measure a respectible 21.6 mag/sq arcsecond using the Unihedron
            Sky meter. Such a sky warrants shooting dark nebula. Here we
            see two with complex structure. There is an enormous amount of
            interstellar dust in this part of the sky. This causes many of
            the stars to appear yellowish or brown making color balance tricky!

            
This is a 1 hour exposure
            with the 8" f/3.9 astrograph and Televue Paracorr 2.

            
Select an image size for a larger view:

1400 x 1200


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Televue Paracorr II (EFR = 4.5)
Mount:  Astrophysics 1200 QMD
Camera:  ZWO ASI071MC Pro Color CMOS
Guider: ZWO ASI mini  w/80mm piggyback refractor
Exposure:  60m ( 5 min subs)
Location:  Happy Jack, Arizona, Elevation:  6900 ft.
Sky:  Seeing FWHM = 1 arcsec , Transparency 9/10
Outside Temperature:  45 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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