M3 - Globular Cluster

M3 - Globular Cluster in Canes Venatici

M3 (NGC 5272) is a globular cluster consisting of approximately 500,000 stars located within our galaxy at a distance of approximately 30,600 light years.  This cluster is located in the constellation Canes Venatici.  More information about this object and additional images can be found at the Messier Index - M3.  

The above image is a composite of 29, 10-second monochrome images taken on 2 July 2000 combined with red (8x10sec), green (20x10sec), and blue (7x10sec) exposures taken on 8 July 2000.  It was processed using Kunihiko Okano's Digital Development Process algorithm followed by Histogram Optimization and later merged with a high-pass filtered version of the same image.  The white component from 2 July 2000 is shown below.  

M3 - Globular Cluster

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