Lunar 22° & 8° Halos
Taken by Alan Dyer on January 30, 2023 @
near Gleichen, Alberta
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Camera Used: Canon Canon EOS R5
Exposure Time: 1/200
Aperture: f/4.0
ISO: 400
Date Taken: 2023:01:31 13:19:08
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Details:
An ice crystal halo around the waxing gibbous Moon set in the winter stars of a January night. The 22° halo is most obvious and with a reddish inner rim. But a faint 8° halo is also visible, a rare halo sometimes called the Van Buijsen Halo (according to Lynch and Livingston in their book Color and Light in Nature; Minnaert also mentions it in his seminal book The Nature of Color and Light in the Open Air). It is not a lens flare as shots taken with the Moon well off to one side of the frame still show the inner halo centred on the Moon.
The Moon was in Taurus this night and very close to Mars, shining here just above the Moon. An occultation occured for locatons in the southern U.S. and Mexico this night, but for me in Alberta it was a very close conjunction. Orion is at lower left; Gemini at upper left; Auriga above the Moon; and Perseus is at upper right.
To retain the disk of the Moon and better capture the scene as the eye saw it, this is a blend of 7 untracked exposures, from 20 seconds to 1/200 second with the RF15-35mm lens at 15mm and f/4 and Canon R5 at ISO 400. Blended with luminosity masks.
Photographer's website:
https://www.amazingsky.com
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