Pickering's Triangle

Pickering Triangle
All Images Copyright Steve Cannistra

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Please click here for a horizontal view.

Magnitude:  Unknown.
Size: Roughly about 60 arcminutes.
2,600 light years
RA: 20h 51m 10s
Dec: 32 degrees 9' 53"

Pickering's Triangle is part of the Veil Nebula complex, located between the Western Veil and the Eastern Veil.  Please click here for a wonderful wide field view of this region taken by Rob Gendler.

Photographic Details:
Ha:(HaR:G:B)- exposure time for Ha was 60' unbinned.  Exposure times for R, G, B were 20' each (inbinned).  HaR used for the R channel was a mix of 50:50 Ha and R, with R used in lighten mode in Photoshop.
Date:  August 9, 2004.
Takahashi Sky 90 at f4.5 with field flattener/focal reducer, on the G11 Losmandy Mount.
Autoguider:  SBIG STV with e-finder.
Camera:  SXV-H9
Astronomik 13nm bandpass Ha filter and RGB type II filter set.
Exposures:  12 x 5' subexposures for Ha.  5 x 4' subexposures for R, G, and B each.  Total exposure 120 minutes.
Conditions:  Temperature 65 degrees F; average transparency; below average seeing; calm; a few high, thin clouds.
Post-processing:  No darks, flats, or bias frames used.  Gradients in the color channels corrected in ImagesPlus.  Images were aligned in ImagesPlus, combined using RC Sigma combine plug-in (MaximDL/CCD), and assembled in Photoshop. 
The technique of "Luminance Corrected LRGB" was used to preserve luminance detail and color saturation.

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