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The Sun 26th April 2015

April 26, 2015 Leave a comment

diskandpromscol-15-04-26-09

Quite a difference on the north east (top left) limb of the Sun today compared to two days ago. The huge hedgerow prominence has now rotated onto the side of the Sun facing Earth and rather than seeing it side-on we are now looking at it from the top as a floating filament against the background chromosphere. It has all but disappeared in my little 40mm hydrogen alpha telescope and is represented by the darker smudge at top left, close to the tallest prominence. The tall prominence is the last visible trace of the longer hedgerow prominence on the limb before it also rotates westward and turns into a filament. Another dark filament can be seen on the right of the disk close to the active region 2331 and 2327 sunspots.

limbproms2Above: Close up view of the prominence and filament region on the north east limb

cakdisk-15-04-26-10-19-10vdAbove: The Sun in CaK light showing sunspots and active regions 2331, 2327, 2325

Images taken 9.53 – 10.19 am (UTC+1) Coronado Ha PST 40mm, Coronado CaK PST 40mm, Imaging Source DMK41 mono video camera. Processed in Registax 6 and Photoshop CS2.

The Sun 26/3/15 – Active Region 2305 and a large ‘Hedgerow’ Prominence

March 26, 2015 Leave a comment

DiskandpromsHa view with large ‘hedgerow’ type prominence

Sunspot2305Active Region 2305 Sunspots in CaK light

Active region 2305 is near the centre of the sun and facing Earth which could give us some nice aurora if it flares. The region has a beta-gamma delta-magnetic field which is capable of producing the most energetic X-Class flares and if this area erupts in the next couple of days the ejected material could have a large impact down here.

Imaged with Coronado PST Ha (40mm) and Lunt Solar Cak wedge (100mm) with DMK41 camera.

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