M10 in Ophiuchus
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Scope: C8 at  f/5 Location: Del Mar, CA;   16  Apr. 2005; Camera: ToUcam SC3

Exposure: 16 x 28 sec and 16 x 9 sec exposures with IR filter 15 x 16 sec each RGB exposures.

Processing: Images were captured in K3CCDTools 2. Aligned/stacked in Registax 3 and saved as FITS. Luminance and Color channels were scaled and rough color balanced in IRIS. Channels were co-registered in IRIS. The 28  sec  exposures were used as the base Luminance channel. The shorter Luminance exposure was normal combined with mask to control star size  and desaturate the cluster core in the. L,R,G,B masters were resized to 800 x 600 prior to curves and levels.  Luminance and Color FITS were combined in Photoshop with Luminance Layering. Color balancing and final touches in Photoshop (including background noise subtraction on the Luminance master). SGBNR (PixInsight LE) was used to smooth remaining background noise on the  luminance channel. Final size approximately 800x600.

This image was guided. M10 is a globular cluster located about 14,300 light years from our solar system.  While the bright central area of this globular looks to be only about 8-9 arc minutes, there are a number of smaller outlier stars in this structure out to about 15 arc minutes. That is just about the width of this image. This image replaces an earlier image which can be seen here. Horizontal FOV is 16'

Image center is approximately Equatorial 2000: RA: 16h 57m 09s Dec: -0405'56"

 

 

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