Home > Solar > The Sun 17-8-11 Active Regions 1271 & 1272 CaK + Ha

The Sun 17-8-11 Active Regions 1271 & 1272 CaK + Ha

It’s been way too long since I last did some imaging, but after seeing the activity on SDO tonight I had to take a closer look and get some images. Active Regions 1271 and 1272 in the east looked great in CaK with some fairly large spots and pores. Quite a lot of short filaments around on the disk and two very dynamic proms in the NW. I used Registax 6 for the first time to align and stack the AVI’s and it did not go well initially with an ‘Extended AVI Error – Failed to read no. of frames’ message constantly popping up for images larger than 1Gb. They seem to have made Registax 6 more automated and I could not find a way to get it to process extended AVI’s manually. In the end I had to resort to saving the DMK Y800 AVI’s as Virtualdub AVI’s and curiously Registax 6 would read these even though the file sizes were double the size of the DMK files !! I’ll report the problem to Cor Berrevoets over at Reg 6 and see if anything gets fixed. In the intervening year I also seem to have forgotten the processing techniques for merging the Ha surface and prom shots – it was easy in PSPx but Photoshop Elements 9 does it in an entirely different, and frankly more clumsy, way. Still, its good to be imaging the sun again and seeing some great activity in all wavelengths.  Images taken 17.40 UT  with PST Ha, CaK diagonal B1200, DMK41, Vixen 115s

Active Region 1271 in the east

Active Regions 1272 (top) and 1271 in the east – CaK

Close up view of AR 1271 in CaK

Nice prom activity in the NW – PST

Categories: Solar
  1. August 18, 2011 at 3:54 am

    Fantastic shots, really inspiring. Thank you for sharing.

  2. August 18, 2011 at 11:49 am

    Thanks Nick

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