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The hot stellar wind that drives this nebula is just below center, the 7.2 magnitude type O4 known as HD 192163. Such nebulas form when hot stellar winds blow bubbles and are know as "Wolf Rayet" stars. The resulting nebula is tattered and moving away from the star at high speed. The resulting nebula, NGC6888 is also known as Sharpless 2-105, it is 18 arc minutes long and gradiates in color from a deeper red to pinks from left to right. This is an RRGB image, the luminosity data was taken with the red filter. This object fits rather well on the ST8i chip, I took several one minute shots binned 3x3 to get the exact framing for this composition.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST8i NABG with Enhanced Cooling
Guider: SBIG ST4
Exposure:  RRGB = 120:20:20:40 (RGB Binned 2x2)
RGB Combine Ratio:  1: .8: 1.2
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FWHM = 4.5 arcsec (Maxim DL - 10min subframe), Transparency 7/10
Outside Temperature:  15 C
CCD Temperature:  -20 C
Processing Tools:  Maxim DL,  Photoshop, AIP4WIN, PW Pro, RW Debloomer.

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