Green formations can also be observed on the lower edges of large sunspots as these are much darker than the Sun. In these cases one should not consider the green ray on the lower part of the spot, but on the upper part of the Sun below the spot. On the evening of July 11 2023 I tried to take the green ray on the large sunspot AR3363 and I succeeded. From Viterbo, Italy. In the image I propose you can see mainly four effects: The refraction that flattened the solar disk, atmospheric absorption with scattering that made the solar disk redder, the Green flash on almost all sunspots and finally the Green segment on the upper edge of the solar disk in both shots. Here are the shooting data: Nikon Z9 in APS-C mode with Nikon Z 400/4.5 plus 2X doubler (equivalent focal length of 1200mm) and exposure times of 1/32,000 f/20 at 18:35TU for the first solar disc , 1/32,000, f/11, 400Iso at 18:41TU for the second solar disk, 1/28,000 f/14 at 100Iso at 18:36TU for the enlargement of the sunspots with the green beam.

Daten zum Bild