Sun Fun ('.')

RE: Sun Fun ('.')

Postby paulc » Sun Sep 05, 2010 3:26 pm

Still a busy Sun in the disc with sunspots and a variety of filaments. The large sunspot is near the north west limb and will soon be out of sight , the second concentrated group of sunspots and filaments is following it. I have again added an extra sketch to show detail. The filaments are in all quarters the largest near the south east limb. Groups of prominences are along the limb except in the south east, the largest located on the western limb.

[image]local://3228/AA162E8543804645A038A5EBEC434913.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Mon Sep 06, 2010 12:00 pm

A very hazy morning, the Sun had periods of clarity though, but not any more! Got as much detail as I could, but I think I missed some, will try again later. The second sunspot group is still with us and approaching the north west limb. There are filaments in the south east and north east quarter one with a pronounced arc shape as yesterday. Dark markings form another arc near the north east limb. Three prominences were visible on the north east limb and one long one due south.

[image]local://3228/0648BF0964F84D679067707A6596C917.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Tue Sep 07, 2010 10:30 am

A bright clear sunny morning after last nights deluge. The second group of sunspots is still on the limb and will soon be out of sight. There is a myriad of filaments in the northern hemisphere and one large arc trailing into the south east quarter. Many of them are broad. Prominences are visible around the limb except in the south west. The largest are on the north east limb. A feint loop and companions are visible on the south east limb

[image]local://3228/F184677DBD214337A79AE89BC2430EAF.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sat Sep 11, 2010 4:26 pm

Have been a little busy this week, nice to get back to the relaxing Sun. It is quite active today with many broad filaments particularly in the northern hemisphere and generally in the north east quarter. One is due south. Prominences are visible around the limb due north, south, east and west. The largest in the east. A large sunspot is visible almost due south.

[image]local://3228/A3F7F5AF5A9B4432AFC6B2EF34F32B31.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sun Sep 12, 2010 11:20 am

I think I got the poles wrong yesterday for some reason not sure why. The large sunspot is on the move away from the limb and there is a smaller spot just above it. Near the east limb there is facula with a dark spot in it, could be a small sunspot, detuning the pst was inconclusive and with the clouds it was hard to verify it in the solar film scope. The numerous filaments have become more diffuse and broadened. Prominences are on the limb in each quarter, the largest in the north east.

[image]local://3228/EEB793AB2EE749ACBECFA044791DA243.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sat Sep 25, 2010 11:46 pm

Back for some more Sun Fun. Large prominences are located on the limb due east and north west, groups of smaller prominences are in the south east and south west. An active sunspot region is due east containing about six sunspots of varying size with penumbra. The largest one is an interesting conglomeration of shapes, two welded spots and one smaller one. The second sunspot region is towards the western limb and at x160 in the baader film scope shows a similar mix of shapes, two spots and a broad streak. Interestingly a smaller spot is visible outside this region. The faculae are clearly evident around these active regions. Filaments are scattered around the eastern active region. These observations were made this morning around 9 - 10am.

[image]local://3228/184009DE13B84CB8984312689B496330.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Sun Sep 26, 2010 11:26 am

The two sunspot regions continue to progress across the disc with pronounced faculae. Large prominences are still on the west and north west limbs. Broad filaments are to be seen near the limbs in the north east, north west and south west. Small prominences are on each limb.


[image]local://3228/627B22BA7941431D9881AB13411A11C6.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Thu Sep 30, 2010 11:33 am

The Sun is out again at last. The larger sunspot region is still visible consisting of one large penumbra region with a varied internal structure of three distinct shapes in the umbra and another smaller round sunspot. South of the penumbra are six smaller sunspots with two filaments and further towards the north west limb are two groups of two smaller sunspots. The scale of this region in the sketch is a little exaggerated. Filaments are located near the north pole and centre of the disc. Numerous prominences are on each limb region including three large ones.


[image]local://3228/6FD7E68EDA304A6F82780514953D0D15.jpg[/image]
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RE: Sun Fun ('.')

Postby paulc » Mon Oct 04, 2010 12:46 pm

There are prominences in the north east and west and south west limbs. The largest in the north east. The complex sunspot has almost gone it is on the north west limb and a few filaproms are visible. There is a large faculae in the centre of the disc, but no accompanying sunspot activity. There are broad filaments in the northern hemisphere, mainily in the east. There is a small very dark spot with strands from each side in the north east quarter seen by detuninig the pst, but it does not show in the baader film scope.

[image]local://3228/6B9B7ED2007F4F2C8E61F7615031A04D.jpg[/image]
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RE: Sun Fun ('.')

Postby brianb » Mon Oct 04, 2010 1:03 pm

[quote]There is a large faculae in the centre of the disc, but no accompanying sunspot activity.[/quote]
Actually there are two tiny spots embedded in the activity - the decaying remnants of AR 11111.

[pedant mode]Bright patches in Ha (or CaK) are technically plages, not faculae ... faculae are lighter patches visible in white light[/pedant mode]

[quote]There is a small very dark spot with strands from each side in the north east quarter seen by detuninig the pst[/quote]
It's a filament. It shows up better with the etalon detuned because it's eruptive, moving fast enough in the line of sight to have a significant doppler shift.

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