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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

04/20/2022
11:30 pm

Equipment Details:

Celestron 150mm XLT f/5 reflector, ZWO ASI533MC Pro camera with Optolong L-Pro filter, SkyWatcher EQ6R Pro mount.

Post-processing Details:

26 4-minute lights plus calibration frames were stacked using ImagesPlus; other post-processing used Photoshop CS2 plus Astronomy Tools plugin, Siril, and PhotoScape X

Image Details:

Messier 13, also known as the Hercules Globular Cluster, is a large globular star cluster in the constellation Hercules. Messier 13 is 145 light years across and contains about 300,000 stars. It is 22,200 light years from Earth.

Posted

January 20, 2019

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David Callejas

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About the Author:

David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us and appreciate the work we do. He helps manage the EarthSky Store and bring to you the new products that you love. He's the chief liaison between EarthSky.org and the world of commerce. All that, plus he helps post content and populate our pages on Facebook, Google+ and Twitter. Go David!