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Lots of minor activity in AR 2661 (animations)


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I've had a fruitful weekend: good seeing (for 90 mm aperture, that is), crystal clear skies on Friday, and equally good seeing on Saturday with 1/3 cloud cover miraculously sweeping sideways from my location since morning to 4 pm. Too bad I caught only one stronger C-class flare in AR 2661 in all those hours.

Everything captured with a 90 mm refractor with Lunt 50 etalon, PGR Chameleon 3 mono (ICX445), processed with Stackistry and ImPPG, showing AR 2661.

Overview shot of AR 2661 on Friday morning:

ar1_pn.thumb.jpg.89330dbd4b51da1669b6d66c4eb84306.jpg


Friday, 30-s intervals, 0:53 h and 1:06 h. Lots of small-scale activity, too bad it wasn't exactly on the limb as on Thursday; the spikes and surges would look even better (as in http://astrob.in/262196/B/):

741d63ea-9c37-4fc2-a416-9277b9c84d8b.gif

50f5d83a-fa3a-4541-9079-e56d5d413b59.gif


Saturday, 30-s intervals, 2:15 h total. A class C2.1 flare peaked at 9:57 UTC (preceded by a few smaller events around):

0bc938cc-1949-42ac-b3ee-3c866f9031ce.gif

The flare maximum:

flc.jpg.4d9d75b84dc229c2f146bf16ba79f4ec.jpg

 

And the whole material from Saturday on fast forward (5-minute intervals, 4:45 h total), showing the changing aspect as the Sun rotates:

fcd4bf4f-13fc-4e8d-b175-0158607f8602.gif

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  • 9 months later...

Have you got any pictures of or links to information on your 90mm refractor / Lunt 50 Etalon setup?

I have Lunt 50 and LS50C Double stack but there doesn't seem to be any adapter available to mount the LS50C on any refractor (although the LS50FHa does have adapters available).

Regards,

Alistair G.

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11 hours ago, Live_Steam_Mad said:

Have you got any pictures of or links to information on your 90mm refractor / Lunt 50 Etalon setup?

I have Lunt 50 and LS50C Double stack but there doesn't seem to be any adapter available to mount the LS50C on any refractor (although the LS50FHa does have adapters available).

Regards,

Alistair G.

It's a “mod” which increases the aperture (and resolution) at the cost of reduced sweet-spot size (i.e. whole disk cannot be viewed in Hα). Details:

https://solarchatforum.com/viewtopic.php?f=9&t=19238

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