This is the famous Helix Nebula, a large planetary nebula in the
constellation Aquarius. It is only about 450 light years distant and
covers about half a degree of sky (about the size of a full moon).
Although bright at magnitude 7.3 the nebula's light is spread across such a
wide area of sky that it is a challenging visual target.
Okie-Tex Star Party
Telescope: LX200 10" SCT @ f/6.3
Mount: AP-1200 GTOCP3
Camera: Hutech Modified
Canon 350D @ ISO 800
Exposure Count: 35 x 10 min, 350 minutes total
Guiding: SBIG ST402ME, CCDSoft
ImagesPlus: Dark and flat calibration, align and
combine, digital development
Photoshop CS3: Smart sharpen, levels
NeatImage: Noise reduction