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David Callejas

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January 20, 2019

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Ryan Walsh
Leslie, Michigan

10/03/2022
03:00 am

Photographer's Website

Equipment Details:

William Optics FLT91 telescope (with 0.8x reducer/flattener), ZWO asi2600mc pro camera, SkyWatcher AZ-EQ6 pro equatorial mount

Post-processing Details:

Stacked in DeepSkyStacker, processed in Adobe Photoshop
296 x 3-minute light frames + dark/flat/bias frames - 14 hours and 48 minutes of total integration time

Image Details:

The Iris Nebula is a reflection nebula located around 1300 light-years from Earth in the constellation Cepheus. It is illuminated by a bright central star: SAO 19158. The light from this star reflects off surrounding dark cosmic dust, creating the blue color. This dark cosmic dust extends out into the area surrounding the reflection nebula as well.

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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!