NGC869-884 in Perseus - The Double Cluster (deeper)
Star Clusters in Winter MilkyWay
Uploaded 1/25/21

 
This
            is the deepest shot of the Double Cluster I have yet taken. Stars
            to nearly 20th magnitude are seen here, along with a host of
            colorful spectral types from orange M and K class supergiants,
            to supersized blue A and B type stars. Composition is absolutely
            critical here. 2 hours total exposure with the 10 inch f/3.9
            and Baader MPCC coma corrector.

            
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:  2 hours (5m subs)
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 2 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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