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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

07/15/2022
11:30 pm

Equipment Details:

ZWO ASI183MC camera, WO RedCat 51 astrograph, ES iEXOS-100 mount.

Post-processing Details:

Thirteen 90-second unguided exposures were stacked with DeepSkyStacker; photometric color calibration and background extraction with Siril; levels and color adjusted with Photoshop plus Astronomy Tools plug-in; noise reduction and final treaks with PhotoScape X.

Image Details:

This is an image of the large Oort cloud comet C/2017 K2 PANSTARRS, which is currently passing through the constellation Ophiuchus, one day after the comet's closest approach (about 1.8 astronomical units) to Earth. Of note are the comet's large coma and short stubby tail. Messier 10, a globular star cluster, can be seen nearby.

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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!