On 4th March Jitka R. from the Czech republic captured this magnificent odd radius display on the Moon. After stacking multiple images, many halo forms showed up - particulary 9°, 18°, 20°, 24° and 35° halos, along with 9° and 24° plate arcs.
It was a case of sublimating cirrus, which could be easily seen on the satellite images.
And I have a question for the halo experts - is it possible that the 9° column arcs are captured, too? Or could it just be a cirrus of a higher quality?
That is a beautiful odd radius display
ReplyDeletePossibly the 9° halo enhancements are a sign of poor column orientations. But you might want to get a better defined case before you tick the 9° column arc. Well, I guess it is up to anyone's preferences.
ReplyDeleteThank you Marko for your insights on this. I thought so the same. Of course it would be nice to tick the box, but I think by being "reckless" for the lack of a better word, then this would probably not be the first case of 9° plate arcs in the Czech Republic.
DeleteYeah, especially if it is going to be the first one in the Czech Republic, then you might like it to be a robust case, a source of pride. Purists and connoisseurs may prefer to accept only cases where the column arcs exhibit their true arc shape separating from 9° halo, but then our column arc observations would hopelessly few and far between.
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