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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

01/12/2023
07:30 pm

Equipment Details:

ZWO ASI533MC Pro camera and Optolong L-Pro filter, Celestron Omni XLT150 reflector, SkyWatcher EQR Pro mount.

Post-processing Details:

Eighteen 8 minute subs (guided) plus calibration frames were stacked with DeepSkyStacker. Post-processing was with Siril, Photoshop and MS Photo.

Image Details:

I captured this image of Messier 35 (on the left) and its neighbour, NGC 2158 (on the right), from my Bortle 7 backyard last night before the clouds arrived. Messier 35 is a large open star cluster that is 2,970 light years from Earth. It is about 24 light years in diameter and 110 million years old. NGC 2158 is a compact, metal-poor, open star cluster that is 11,000 light years from us. It is about 17 light years in diameter and estimated to be 2 billion years old. These star clusters are located in the constellation Gemini.

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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!