NGC7635 - The Bubble Nebula
Bright nebula in Cepheus
with 10" f/3.9 Astrograph
Uploaded 12/15/20

 

            
This amazing object
            located in Cephus on the Cass side is the center of an extended
            region of nebulosity in a dense star field. The bubble in the
            center is similar to a Wolf-Rayet bubble, in that a hot O or
            B type star is shedding a powerful solar wind which blows a bubble
            in the surrounding hydrogen gas. To the lower left is the star
            cluster M52 running off the 1.5 degree field here.

            
Sharpless 2-159 is the
            small patch of nebulosity to the left side of the field. There
            is also a faint planetary nebula on the upper rigth side of the
            field, but it is stellar in appearance.

            


            
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:  2h OIII+Ha and 30m RGB
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 9/10
Outside Temperature:  40 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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