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Open Cluster M93: M93 in the upper left of this image is one of the less conspicuous Open Star Clusters in Messier´s famous catalogue. It is in a distance of about 3600 LY.

In the lower right corner a faint emission nebula is also displayed: Sharpless 311.

The bright star in the center is called Azmidiske in a distance of about 1500 LY.

Object Open Cluster M93
Category Open Clusters
Designation M 093
Constellation Puppis
Optics Takahashi FSQ 106 ED f/5 x 0.73 reducer
Mount Astro-Physics 900 GTO
Camera SBIG STL 11000M with internal CFW 5
Exposure 2x20min Baader H-alpha filter, 3x5min each Baader RGB filterset. Maxim DL for image acquisition
Calibration Dark + Flat Frame
Guiding StarlightXpress Lodestar and Skywatcher ED 80 as Guide Scope, Maxim DL as Guiding Software
Processing Maxim DL5, CCDStack, Photoshop. Color Code L:Halpha,R/H-alpha,GB
Location-Date Somerset West, South Africa - 7 Feb 2011
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