M26: M26 is an open cluster in the constellation Scutum. This is one of the often-overlooked clusters, because of its proximity to the more visually appealing M11.
Right Ascension: 18h 45.2m
Declination: -9° 24'
Apparent Magnitude: 8.0
Date: November 2010
Telescope: Meade 16" Schmidt Cassegrain with f6.3 reducer (used at ~ f6.1)
Camera: SBIG ST-10XE
Exposure: L: 10x1m, binned 1x1
RGB: 6x1m, binned 2x2
The camera was at -35°C
Processing Notes: Data acquisition with CCDSoft. Reduced and aligned in CCDStack and combined with Sigma combine. Arcsine stretch import of L into Photoshop. Repaired three brightest stars. Adjusted curves and levels. Slight noise reduction and blur on the dim areas and overall sharpening. RGB combined in AstroArt at 1:1:1.60 ratio. Adjusted curves and levels, and reduced noise of RGB. L was combined with RGB as a single luminance layer.
Scale: 0.52"/pixel on highest resolution
Additional Comments: This image was taken during a star party as an example of how imaging is done. There were about 12 people in the dome at the time, and I was glad that everything worked as described. I have found very few other images of M26 on-line.