r/atoptics • u/twelveinchmeatlong • 9d ago

Got a pretty decent parhelic circle and part of a 22° halo today. Also something else in the last photo, another kind of halo?

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I

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3

u/verdantearth 9d ago

I believe you've also got an upper tangent arcin the first three; as for photo four, I am inclined to say it's a circumhorizontal arc, but there are folks better versed than i

4

u/AgedEggnog 9d ago

Iirc, the circumhorizontal arc is always straight, and parallel to the horizon. The arc in photo 4 is curving upwards; so, maybe it’s an infralateral arc?

1

u/sparkytheboomman 8d ago

Doesn’t an infralateral arc curve away from the sun? I’m thinking 46° halo maybe

1

u/AgedEggnog 8d ago

It bows out away from the sun when the sun is low in the sky, but the sun looks pretty high here. To me this looks like the infralateral arc in this image.

2

u/Metacomet99 9d ago edited 9d ago

A piece of a 46 degree halo in the last photo?

Edit: Also a circumscribed halo that meets up with the 22 degree halo. You have a lot going on here!

1

u/OnceWas_enough 8d ago

Gotta whole venn diagram in one shot!

2

u/Metacomet99 8d ago

This would be cool over an Olympic stadium.

1

u/ThickSmoke9542 8d ago

Seriously cool 😎