NGC 6633 in Ophiuchus

CLICK ON IMAGE FOR FULL SIZE VIEW (1800x1350)

Scope: Megrez II 80 mm refractor  at f/5.6, Location: Laguna Mountains, CA   9 June 2012  Camera: Artemis285

Exposure: 15 x 3.5 min  (1x1 bin) exposure with UV/IR block, 10 x 1.5 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. This image is a straightforward LRGB combine with Luminance layering.     Final Image size is approximately 1800 x 1350.

North is up in this image. NGC 6633 is a cluster with about 30  stars. This is a relatively young cluster whose age is estimated at about 660 million years. The bright star at the lower edge is not a cluster member, but instead it is a foreground star whose distance is 739 light years.  The star cluster  NGC 6633 itself is about 1,040 light year distant from Earth.   Horizontal FOV is 60'

Image center is approximately - Equatorial 2000: RA: 18h 27m 35s Dec: +06°32'59"

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

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