The NGC1931 Nebulosity

Emission Nebula in Auriga

Uploaded 12/21/04

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 There is a plethora of HII regions in Auriga, and this is one of the smallest. A combination of emission nebula and cluster, with a hint of blue reflection nebulosity makes it a really unique object. The star cluster, just below the red nebula is actually NGC1931, and contains the blue nebula. Its 10th magnitude and 6 arcminutes in size. The nebula is Sharpless 237, which includes the blue nebula as part of it's description. Visually in the 12.5 inch, the object appears as a nebulous star, with the "cluster" not being so obvious.
Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG ST8i NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 90:20:20:40 (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: 5 C CCD Temperature: -20 C Processing Tools: Maxim DL, RG Sigma, Photoshop, AIP4WIN, PW Pro, RW Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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