M99: Spiral galaxy in the constellation Coma Berenices.
Right Ascension: 12h 18.8m
Declination: 14° 25'
Apparent Magnitude: 9.8
Date: June 2010
Telescope: Meade 16" Schmidt Cassegrain with f6.3 reducer
Camera: SBIG ST-10XE
Exposure: 10x5 minutes luminance. Mix of binning 1x1 and 2x2.
Processing Notes: Data acquisition with CCDSoft. Reduced and aligned in CCDStack. Subs combined in Sigma Beta. Arcsine stretch import into Photoshop. Adjusted curves and levels.
Links to images of this object on other sites:
Additional Comments: This is the first light image with the AO-8 "adaptive optics" autoguider used with the ST-10XE. This was a new configuration of the camera, so a couple of the sub-frames ended up with "odd" flats. The blemish in the upper left is from an internal scope reflection of the very bright star in the lower right. A 2008 RGB image of M99 can be found here: http://www.fortlewis.edu/observatory/image_detail.asp?ID=96
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.