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David Callejas

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January 20, 2019

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Richard Swieca
Dollard des Ormeaux, Montreal, Quebec, Canada

12/05/2022
10:00 pm

Equipment Details:

Samsung S22 cell phone. Focal length 2.20mm (wide angle setting). F2.2 1/4sec ISO 1600. Hand held

Post-processing Details:

None

Image Details:

A 22 degree "Moon ring" or "winter halo," created by refraction of moon light by millions of hexagonal ice crystals. More specifically, the average angle is 21.84 degrees; 21.54 for red light, 22.37 for blue light. This wavelength dependent variation in refraction causes the inner edge of the circle to be reddish while the outer edge is bluish. (Wikepedia, article "22o halo"). The red planet Mars appears just to the east of the halo.

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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!