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The
NGC1931 Nebulosity
Emission
Nebula in Auriga
Uploaded 12/21/04
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.
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