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Contains:  Solar system body or event
A very rare atmospheric effect (please visit link), 



    
        

            Amir H. Abolfath

A very rare atmospheric effect (please visit link)

Acquisition type: Lucky imaging

Technical card

Imaging telescopes or lenses: Vixen VC200L

Imaging cameras: Canon EOS 5D Mark II

Software: Photoshop

Accessory: Manfrotto 055 Tripod



Resolution: 2386x1426

Data source: Traveller

Description

During Mercury transit I took a photo with a strange phenomena. I send it to Les Cowley from https://www.atoptics.co.uk/ to check it. He asked me to need a second opinion and sent it to Professor Young in California as an expert on mirages and atmospheric refraction.

And there was some good news for me from Les:

"Dear Amir,

I have good news. Andrew Young has confirmed that your peculiar green feature above the sun’s upper limb was real. Not a camera or processing artefact.

The effect probably arose from a combination of (1) optical ducting from a weak temperature inversion (2) your position relative to the duct and (3) the hazy Tehran atmosphere.

Ducting is a phenomenon where a temperature inversion causes sunset rays to be refracted up and down and so travel considerable distances. More about ducts here:
https://www.atoptics.co.uk/fza150.htm

Ducts produce images and green flashes. The appearance of them depends on your altitude and the height of the temperature inversion/duct.

What you imaged is a type of sub-duct refraction seen when you are just below the duct. It would only have lasted a few seconds which accounts for it not showing on your other images. It is very rare."

Comments

Author

Amir.ho.abolfath
Amir H. Abolfath
License: None (All rights reserved)
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Revisions

  • Final
    A very rare atmospheric effect (please visit link), 



    
        

            Amir H. Abolfath
    Original
  • A very rare atmospheric effect (please visit link), 



    
        

            Amir H. Abolfath
    B

Histogram

A very rare atmospheric effect (please visit link), 



    
        

            Amir H. Abolfath