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M7 in Scorpius

 

CLICK ON IMAGE FOR  FULL SIZE VIEW (1800x1350)

Scope: Zenithstar 66 mm refractor at f/4.6, Location: Tierra Del Sol (SDAA Club site), CA  6  July 2013  Camera: Artemis285

Exposure: 13 x 6 min  (1x1 bin) exposure with UV/IR block, 8 x 2.5 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Artemis Capture (as FITs).  Calibrated, stacked (Sigma Combine), LRGB channel registration, equalization, central gradient removal - Astroart.  Curves, Levels, LRGB combine and finishing  - Photoshop. Final color Calibration with eXcalibrator. This image is a straightforward LRGB combine with Luminance layering.     Final Image size is approximately 1800x1350.

North is up in this image. This is an image  of a popular Southern Open Cluster sometimes called Ptolemy's Cluster.  It is relatively young at an estimated 220 million years and relatively close at an estimated 800 light years. You can also see the Globular Cluster NGC 6453 as a golden smudge in the upper right. This image replaces an earlier image now in the Archives  here. Horizontal FOV is about 101'.

Image center is approximately - Equatorial 2000: RA: 17h 53m 54.0s Dec: -3449'00"

 

All images and content remain the property of Jim Thommes - copyright 2003 - 2013

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