Cloud Iridescence
Taken by Scott Randal on January 13, 2018 @ Stevens Pass, WA, USA
Click photo for larger image
  Camera Used: motorola Nexus 6
Exposure Time: 626/1000000
Aperture: f/2.0
ISO: 40
Date Taken: 2018:01:13 14:05:23
More images
Our snowshoe hike started in light sleet, but the weather cleared on our return leg. One member of our party happened to look up at the right time.

(Nexus 6 phone)
  You must be logged in to comment.  
Actually not the real physical iridescence, which has its origin in diffraction and interference in cloud droplets, but an ice crystal halo effect by refraction. I have determined this as the circumzenithal arc which appearts quite straight above your head, just as you did observe it. In your picture, we enjoy a quite bright example of this halo.
Posted by pphv 2018-01-15 02:31:29
I wasnt familiar with circumzenithal arcs and I agree that its a better explanation. Thanks for the information, pphv! Also, the sun was at 16.5 degrees, which is consistent with a CZA.
Posted by sokor 2018-01-15 03:57:25
34 thumbs up
previous | next
Guide to Northern Lights
DarkSky Telescope Hire
Stargazing Experiences
Home | FAQ | Contact the Webmaster
©2016 All rights reserved.