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Posts Tagged ‘active region’

Giant Sunspot Region AR 2529 17-4-16

April 22, 2016 Leave a comment

The Sun’s activity is now heading towards solar minimum, but it can still occasionally surprise us with some large surface features such as sunspot active region AR 2529 which appeared over the last weekend. To give you some idea of scale you could fit five Earth’s inside the dark area of that sunspot ! It is so large people have reported seeing it at sunset behind thin cloud with the naked eye.

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Images taken 17-4-16 12:10pm, PST CaK, DMK 400

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 – 18th April 2015

April 18, 2015 Leave a comment

video0019-15-04-18-12-19-00-rotatedAbove: Ha Disk

video0020-15-04-18-12-27-56Above: CaK Disk

There’s a nice string of sunspots on the Sun now with active regions 2321, 2324, 2325, 2326 and 2327 all visible. Prominence activity is low in Ha, but there are some fine filaments arcing around the main sunspots and further out on the north limb.

Images taken 18/4/15 12.14 – 12.27 UTC+1 using Coronado Ha PST and CaK PST and DMK41 camera. Processed in Registax 6 and Photoshop CS2.

The Sun 14th April 2015 – Active Region 2321 Sunspots

April 14, 2015 Leave a comment

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Atmospheric visibility was pretty shaky today with lots of turbulence and high wispy cloud passing over so I was pleased to get this set of images in less than ideal circumstances. Active region 2321 is superb with lots of spot and pore detail and harbors enough energy for some flares. Two new sunspot groups are also rounding the eastern limb (left side of images) so it is going to get pretty crowded on the Earth facing side of the Sun.

Images taken 12.12- 13.23 (UTC+1) with Coronado PST CaK, Lunt CaK diagonal at 100mm on Vixen 115s, DMK41 camera.

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