Located near Caph, also known as Beta Cass, this small round nebula is a beautiful Stromgren sphere, consisting of a ionized ball of hydrogen gas. At 5 arcminutes in diameter, it is a perfect target for CCD skyshooters as well. I could find little else on this object, except it was illustrated in both the Buil-Thouvenot and Vehrenberg Atlas of Galactic Nebula as a note worthy object.

Processing: L Channel - Cal, Sum Combine and DDP in Maxim, Deconvolve in AIP4WIN. RGB - Cal, Sum Combine, RGB combine in Maxim, LRGB in Photoshop 7, and LRGB color correction to match RGB in PW pro 3.0.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  RRGB = 60:20:20:20 (RGB Binned 2x2)
RGB Combine Ratio:  1: .95: 1.8
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FMHW = 2.0 arcsec, Transparency 8/10
Outside Temperature:  10 C
CCD Temperature:  -25 C
Processing:  Maxim DL, Photoshop, AIP4WIN, PW Pro.

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