Maybe A Tangent Arc?

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Maybe a Tangent Arc?
Taken by Ginger Hipszky on December 7, 2013 @ Colorado Springs, CO USA

Click photo for larger image

Camera Used: NIKON COOLPIX S3000
Exposure Time: 1/1000
Aperture: f/5.9
ISO: 80
Date Taken: 2013:12:27 20:25:31

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Details:

The temperature was below zero and it was sundown. There was an ice fog going on. I looked out towards the mountians and found this in a valley just to the west of us.

Photographer's website:

No URL provided.

Comments

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Does anyone know what this is exactly?

Posted by ghipszky 2013-12-29 15:27:42

Check with
http://www.atoptics.co.uk
this is great site…

Posted by HP1954 2013-12-29 22:26:55

Ginger it depends on how far the arc was from the sun. It seems to be a fine diamond dust (which means the ice fogs particles) halo, in case it was 22 degrees from the sun it was a 22 deg. halo (maybe with sundog not really visible), in case it was the double distance it was an infralateral arc.

Posted by LandyGyebnar 2013-12-29 22:38:28

Monica, the sun was just setting behind Pikes Peak, so it was much higher in the sky than the rainbow. The rainbow was low in a valley and I think the suns rays were shining at an angle. I think it was more than 22 degrees. So possibly it was the infralateral arc.

Posted by ghipszky 2013-12-30 15:48:29

Monica, also, in the photo you can see a slanted piece of mountain, that is an old mine. Right behind is the Front Range. To the left of the mine and farther back is Pikes Peak, there is a thin layer of white cloud outlining the mountain. If I had your email I could send you a picture of all this during a warmer day.

Posted by ghipszky 2013-12-30 15:51:30

HP1954, I sent the picture to the optics page. I also sent a comparison pic of the same area, but in the day time. Thanks

Posted by ghipszky 2013-12-30 18:20:27

You are welcome, that is such a great web site. I spent an hour there one day and learned so much and really enjoyed the terrific photos also.
I keep it in my bookmarks as an online reference.

Posted by HP1954 2013-12-30 22:30:01

HP1954, I did the same, bookmarked it. It is amazing. Got a reply from Les. He said I captured a piece of the 22 degree halo. Mystery solved. Was cool to get a reply email from Les.
Happy New Year every one.

Posted by ghipszky 2013-12-31 21:38:25

Glad you got an answer happy 2014 and good luck with more great shots…
( I love the B&W aspect of the shot also)

Posted by HP1954 2014-01-01 20:49:42

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