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David Callejas

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January 20, 2019

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David Hoskin
Halifax, Nova Scotia, Canada

02/11/2022
01:04 pm

Equipment Details:

Lunt 40mm Solar Telescope, ASI290MM with 2.5x Barlow, Star Adventurer Mount

Post-processing Details:

Best 300 frames of video were stacked using AutoStakkert, wavelets were adjusted with Registax 6, other post-processing with Photoshop, PhotoScape X, and Microsoft Photo.

Image Details:

I imaged sunspot AR2941 in hydrogen alpha just before noon on the morning of 11 Feb. 2022. This is a very wide sunspot group that was active earlier in the week but is now quiescent and rotating out of view.

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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!