M107 in Ophiuchus

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Scope: C8 f/7.5; Location: Laguna Mountains, CA;  3 May 2008; Camera: Artemis285

Exposure: 25 x 1 min Luminance exposure (bin 2x2) with Baader IR Block Filter; 10 x 1 min RGB (bin 2x2)

Processing: Images were captured Artemis Capture (as FITs). Aligned/stacked and dark subtracted in Astroart with Sigma Combine. Luminance and Color channels were scaled and rough color balanced in Astroart.  Channels were co-registered in Astroart. The 1 minute IR block exposures were used for the main luminance construction with level adjustments and curves to bring out object features. All data was up sampled to 200%..Seeing was not good for the image scale and the data had guiding errors. Star trailing was minimized with layer offset and darken blend (with star mask). Some data from the archive image (below) was used in the core area. LRGB combine was done in Photoshop. G2V  factors applied to color channels.  Final Image size is approximately 1392x1040

This image was guided; North is up.    M107 is one of 7 Messier Globular Clusters in Ophiuchus. M107 apparently has some dark obscured regions which is unusual for globular clusters. M107 is about 10,900 light years distant from Earth. This image replaces an earlier image that can be seen in the Archives here. Horizontal FOV is 20'

Image Center is approximately - Equatorial 2000: RA: 17h 37m 36.0s Dec: -03°15'00"

All images and content remain the property of Jim Thommes - copyright 2003 - 2012

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