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solar activity 5th June 2020 - H alpha & the proms
AR 2765 is proving interesting in H alpha.
Using a tunable H alpha filter it's possible to image the AR in various wavelengths.
If you tune well off into the extended Blue wing you end up in the Hydrogen Continuum. This gives "similar" views to a White Light filter. It shows some smaller spots leading the main spot....(Compare this to the white light image)
Coming back into the Blue wing you start to see the plage and activity in the AR, on band (H alpha wavelength) shows the usual views and moving further into the Red wing starts to give better contrast with the fibrils and filaments in and around the AR.
Not much in the way of proms today - a couple of small plumes....
Enjoy!!
Last edited by Merlin66; 06-06-2020 at 09:02 AM.
Reason: correction
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