NGC6528 - NGC6522 Double Globular
Twin Globulars in Sagittarius  star cloud
Uploaded 9/8/21

 
This
            stunning pair of small nearly unresolved globular clusters is
            just to the north west of the Sagittarius teapot spout star Gamma.
            The left globular, which is much smaller is 9.6th magnitude NGC6528
            and is flanked on its lower left edge with a dark nebula called
            Barnard 298. The right globular here in this image is NGC6522
            and is twice the size and magnitude 9.9. The entire field is
            filled with faint stars, and is the small Sagittarius star cloud.

            
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:  50m ( 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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