Post by brianb on Apr 22, 2012 10:43:21 GMT
Lots going on ... cloud a nuisance at times but the seeing was unusually steady in the gaps between them.
Observations made between 1204 UT & 1330 UT. Wind vibration prevented use of my SF-100 Ha filter set so hydrogen alpha images were made with my 60mm Solarscope. Full disk white light is a straight DSLR shot (with Baader solar film filter) made with my FLT 110 & a teleconverter giving about 1200mm focal length; otherwise equipment as normal.
Overviews:
The real highlight was the huge thick prominence in the south west, with one of its legs still projected onto the disc as a filament.
There was also a most delicately beautiful but exceedingly faint prominence on the north west limb. I've left this in natural monochrome as colouring it tends to obscure the fine detail:
Lots of active areas to consider.
AR 11459 is on the meridian, large and incredibly complex. Note the medium sized spot in the unnumbered active area to its north.
AR 11460 is west of the meridian in the northern hemisphere. Another large complex area.
AR 11461 in the north east is pretty well extinct except for a plage patch and a notable filament:
AR 11462 is large and active but now approaching the south west limb. AR 11463, much smaller, is almost at the limb:
AR 11465 in the south east is active and apparently still growing. This is probably our best hope for an aurora producing flare event in the next few days. The Ha image shows another huge filament following it.
I don't know what happened to AR 11464: failed to develop I suppose.
Observations made between 1204 UT & 1330 UT. Wind vibration prevented use of my SF-100 Ha filter set so hydrogen alpha images were made with my 60mm Solarscope. Full disk white light is a straight DSLR shot (with Baader solar film filter) made with my FLT 110 & a teleconverter giving about 1200mm focal length; otherwise equipment as normal.
Overviews:
The real highlight was the huge thick prominence in the south west, with one of its legs still projected onto the disc as a filament.
There was also a most delicately beautiful but exceedingly faint prominence on the north west limb. I've left this in natural monochrome as colouring it tends to obscure the fine detail:
Lots of active areas to consider.
AR 11459 is on the meridian, large and incredibly complex. Note the medium sized spot in the unnumbered active area to its north.
AR 11460 is west of the meridian in the northern hemisphere. Another large complex area.
AR 11461 in the north east is pretty well extinct except for a plage patch and a notable filament:
AR 11462 is large and active but now approaching the south west limb. AR 11463, much smaller, is almost at the limb:
AR 11465 in the south east is active and apparently still growing. This is probably our best hope for an aurora producing flare event in the next few days. The Ha image shows another huge filament following it.
I don't know what happened to AR 11464: failed to develop I suppose.