NGC6992_2009-08-24

Nebulae - NGC 6992

R.A.: 20h 45m 38.0s
Dec.: +30° 42' 30"
Mag.: 7.0

The Veil Nebula, is part of the Cygnus Loop W7radio source 8, or Sharpless 103. Other parts of the loop include the 'Eastern Veil', the 'Western Veil' or 'Witch's Broom Nebula', and Pickering's Triangular Wisp. It is a large, relatively faint supermova remnant in the constellation Cygnus. The brighter segments of the nebula are listed in the New General Catalog under the designations NGC 6960, 6979, 6992, and 6995. The easiest segment to find is 6960, which runs through the naked eye star 52 Cygni. NGC 6979 - the central portion of the Veil Complex is Pickering's Wedge, or Pickering's Triangular Wisp.

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NGC 6992 – Veil Nebula

Date/time:
23.08.2009 23:20 to 24.08.2009 04:40
24.08.2009 22:00 to 24.08.2009 22:50
Az./Alt. positions:
143° / 69° to 275° / 38°
118° / 62° to 131° / 66°
Ambient conditions: 12°C to 15°C, transparency 4/5, seeing 4/5
Location: Trier, Germany

Equipment:
Optics: TMB 92 SS f/5.5 with TSFlat 2
Mount: CGE
Guiding: selfguiding with ST-4000XCM
Camera: SBIG ST-4000XCM
Filter: IDAS LPS

Acquisition:
Software: CCDSoft V5
FOV, Image scale: 100.9 x 100.9 arcmin, 3.01 arcs/pixel
Sub-exposures: 5h 25min (15 x 15min at –20°C + 10 x 10min at –15°C),
50 x 10min dark frames at –20°C and –15°C,

Processing:
Images Plus 3.75. Calibration, stacking, deconvolution.
CS3: Curves and level adjustments, Carbonis Actions, GradientXterminator.

Comments:
Difficult processing. Very dim object. Some artifacts appears on final image.

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