Sun Fun ('.')

RE: Sun Fun ('.')

Postby paulc » Sun Mar 06, 2011 2:23 pm

Hi Honor, no problem, it's nice to see a fellow sketchers efforts, you are most welcome.

I have a sketch for today as well so compare notes.

There are three active regions visible on the disc with numerous sunspots of varying size and the regions with the largest almost due north and east. Plage surrounds the three regions.There are several prominences round the limb with an enormous one almost due south. Worth a look.

[image]local://3228/358EDE114F904B1F90B5EEFC63900106.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sun Mar 13, 2011 1:36 pm

Quite an active Sun today. Still two active regions with plage the largest one in the north west quarter has six sunspots of varying size. The smaller one has four. A long snake like filament is visible towards the south west accompanied by plage. Broader filaments are due west and in the north east quarter. Prominences on the limb are due north, south, east and west. The largest due west and longest due east.

[image]local://3228/BB6D433E09EC4972905EDF7CA59CB951.jpg[/image]
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RE: Sun Fun ('.')

Postby honor » Sun Mar 13, 2011 11:20 pm

High cirrostratus cloud made drawing the sunspot detail challenging but I persevered. Both AR1166 and AR1169 show much activity and complexity, especially AR1166 which hosted a strong filament to the south of the group that broke up and dissapated as I observed. A large prominence to the North West with small prominences visable to the North, West and South.

PaulC, I've found that detail around the Sunspots can be better seen by de-tuning my PST so that only the spots (umbra and penumbra) are observable, have you tried this? I use a Meade 24-8mm zoom eyepiece with my PST and find it useful as prominence detail is better at lower magnification and sunspot detail better at higher without having to change eyepieces. What eyepiece(s) do you use?

Regards Honor

[image]local://1775/4A89CD87125E4C13997D2A97E8DECB36.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Tue Mar 15, 2011 5:33 pm

Hi Honor,

I often detune my PST to view the sunspots. Sometimes the prominences are very faint and I move the region I am interested into a sweet spot in the field of view, slight detunng and refocussing help as well. I use a cemax 10mm eyepiece optimised for solar viewing. I have toyed with the idea of getting a cemax barlow to see if that will improve viewing further.
I also use a 4" refractor with baader film to view dense sunspot regions with a basic 10mm celestron plossal and then a Pentax XW 5mm to get the detail.
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RE: Sun Fun ('.')

Postby paulc » Fri Mar 18, 2011 1:53 pm

There are two active regions visible with sunspots, but they appear quite faint. One in the north east quarter with three small spots and a long thin filament and the other in the south east quarter with five spots. Both regions are surrounded by plage. A third extensive area of plage is close to the south west limb accompanied by a very large broad prominence. Smaller prominences are close by. Another large prominnence is on the north east limb with a smaller companion. Numerous smaller ones are located around the remaining limb. Broad filaments are due north, east and west.

[image]local://3228/4164DC58BE824C2FA41D219B5DAA3EB5.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sat Mar 19, 2011 12:23 pm

The two large prominences are bigger than yesterday and the two active sunspot regions are just about visible with numerous small sunspots and filaments in the one in the northern hemisphere.

[image]local://3228/3F045FD3B8A04009902971F2F05FBD90.jpg[/image]
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RE: Sun Fun ('.')

Postby honor » Sun Mar 20, 2011 1:43 am

Watched an amazing prominence erupt from the sun's south western limb. Started to draw at 10.56UT and noticed two large prominences, one to the south western limb (top left) and one at the north eastern limb (bottom right), after about 10 minutes I noticed the prominence to the south west was changing! I didn't stop drawing until 12.18UT at which time I was exstatic having witnessed such an stunning spectacle. Not as well composed drawing as I would like but all the information I could gleen through my PST is hopefully faithfully recorded.

[image]local://1775/C9732F123245403EBFEF9E4B7C84E83C.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sun Mar 20, 2011 8:56 am

That's a great event Honor, I sketched the prominence, but wasn't observing long enough to see the eruption
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RE: Sun Fun ('.')

Postby paulc » Tue Mar 22, 2011 11:30 am

There are three active regions visible today, two just visible on the south eastern limb, the lowest with two large and one smaller sunspot. The large prominences persist on the north east and south west limbs, smaller ones are located in the remaining limb regions. There are five regions of plage including the three active regions. Two others are in the north east quarter and due west.

[image]local://3228/B228348A028D4A359B687F14BB5C39F9.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Mon Mar 28, 2011 6:20 pm

A very interesting Sun today with five active regions showing sunspots and filaments. Three of these regions are across the northern hemisphre, the first with five small sunspots, the second with two larger ones and broad filaments and the last with one large one. The other two are in the southern hemisphere the first region with one large spot and four broad fillaments and the second with three good sized sunspots. All the active regions have associated plage the southern ones with immense areas. Around the rim are prominences in each quarter some quite large, spikes being the main shape.

[image]local://3228/B5E8C21D3D634464A21CF701AAFFEEAC.jpg[/image]
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