M3 in Canes Venatici
CLICK ON IMAGE FOR FULL SIZE VIEW (2000x1500)
Scope: C8 203 mm at f/6.3, Location: Blair Valley, Anza Borrego Desert, CA 12 April 2013 Camera: ST8300M
Exposure: 16 x 2 min (1x1 bin) exposures with UV/IR block, 10 x 1 min (2x2 bin) RGB exposures.
Processing: Data Collection - CCDSoft (as FITs). Calibrated, stacked (Sigma Combine), LRGB channel registration, central gradient removal, and color equalization - Astroart. Curves, Levels, LRGB combine and finishing - Photoshop. Final color Calibration with eXcalibrator. This image is a LRGB combine with Luminance layering - Final Image size is approximately 2000x1500.
North is up in this image. M3 is one of the Milky Way Galaxy Globular Clusters whose age is somewhat uncertain - Baade's estimate is 5 billion years. M3 spans about 180 light years in its width. It is at a distance of about 33,900 light years from Earth. This image replaces an earlier image that can be seen in the Archives here. Horizontal FOV is 55'
Image center is approximately - Equatorial 2000: RA: 13h 42m 12.0s Dec: +28°23'00"
All images and content remain the property of Jim Thommes - copyright 2003 - 2013
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