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Re: 10-13-2018 Ar2724 - Triple iron arch's

Posted: Sun Oct 14, 2018 2:50 am
by Valery
What this (this sample) filter exact data? What is the telescope and full imaging train?

I see the arc in the center near the spot. But it is difficult to say what the real nature of it.

Re: 10-13-2018 Ar2724 - Triple iron arch's

Posted: Sun Oct 14, 2018 3:53 am
by MalVeauX
Interesting.

I'm always curious how filaments in various wavelengths compare as filaments seen from above, hovering over the surface, compared to the same filaments on a limb with the void of space behind them, in various wavelengths, and why it's so hard to see them there when the should likely be more easy to spot and image, compared to a filament on the surface.

393nm or 540nm?

Very best,

Re: 10-13-2018 Ar2724 - Triple iron arch's

Posted: Sun Oct 14, 2018 8:17 am
by marktownley
Very good Apollo! Ferrets are definitely real, I see them with my CaK setup too.