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M10 in Ophiuchus



Scope: ES Mak Newt 152 mm at f/4.8, Location: Laguna Mountains, CA,   4 June, 2010  Camera: SBIG ST8300M

Exposure:  16 x 2 minutes (1x1 bin) Luminance exposures with IR block,  8 x 1.5 minutes RGB exposures (2x2).

Processing: Images were captured with CCDSoft. Aligned/stacked and dark subtracted in Astroart with Sigma Combine.  All channels were scaled and rough color balanced in Astroart.  Central Gradient was removed on all channels in Astroart. Channels were co-registered in Astroart. The 2 minute IR block exposures were used for the main luminance construction with level adjustments and curves to bring out object features.   LRGB combine was done in Photoshop. G2V  factors  applied to color channels.  Background noise reduction was applied in Pix Insight LE (SGBNR).   Final touches and color balance in Photoshop. Final Image size is approximately 3352x2532 (resized to 3000 x2250).

North is up in this image. The image was guided for all exposures.  M10 is about a 7th magnitude globular cluster located in the constellation of Ophiuchus. In this moderately deep image, the cluster spans about 19 to 20 arc minutes. At its distance, that corresponds to an actual size of 83 light years for this cluster. M10 is approximately 14,300 light years distant from Earth. This image  replaces an earlier image that can be seen here.  Horizontal FOV  in the above image is 60'; the full field image (click on the image above) is 88'.

Image center is approximately - Equatorial 2000: RA: 16h 57m 06.0s Dec: -0406'00"

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

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