Reflection/Emission Nebula in Cassiopeia

Uploaded 11/18/05

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 Over a quarter of an arcminute wide, this exciting combination of red emission and blue reflection nebulosity is difficult to photograph because of the nearby bright variable star Gamma Cassiopeia, which varies from 1.6 to 3rd magnitude. The difficulty is that with such a brilliant star just outside the field, bright rays and artifacts usually wash out the entire image. I spent quite some time on this image removing such unwanted light scatter.

I was impressed at how low of a noise this image was at -30C, no noise reduction was needed on this shot.

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 60:20:20:20 (RGB Binned 2x2) RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 6 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 45 F CCD Temperature: -30 C Processing Tools: Maxim DL, Photoshop, PixInsight, CCDOps Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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