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 Post subject: The SUN - 13th April
PostPosted: Sat Apr 13, 2019 8:30 pm 
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Joined: Sat Dec 11, 2004 8:18 pm
Posts: 6479
Location: Manchester
Dear al(L)
I thought the Sun & its single Sunspot might now be a bit boring for many people . However, I got a nice surprise this afternoon when I observed & imaged the Sun again.
Apart from the fine Sunspot with nice penumbra, there were some nearby pores and a faint narrow light bridge across the Sunspots dark-ish umbra.
from Cliff


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 Post subject: Re: The SUN - 13th April
PostPosted: Sat Apr 13, 2019 11:44 pm 
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Joined: Thu Jun 02, 2016 11:32 am
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Location: New Farnley, Leeds lat 53.8N long 1.6W
So glad you caught the light bridge here. I was observing from Melbourne at 0412 UT on the 13th together with my niece and Inoted in my observing log "large spot - umbra bridged with light spot in centre". 80mm refractor f5, seeing2,transparency 2. Best wishes Bob


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 Post subject: Re: The SUN - 13th April
PostPosted: Sun Apr 14, 2019 12:17 am 
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Joined: Thu Jun 02, 2016 11:32 am
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Location: New Farnley, Leeds lat 53.8N long 1.6W
Hello Cliff, a quick update. I observed again at 2350 on the 13th (a few mins ago). In the slightly steadier seeing I noted 4 smaller, fainter spots near the large one, and the light bridge is still there, although appearing more expanded at the centre than in my earlier obs at 0412. Kind thoughts, Bob


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 Post subject: Re: The SUN - 13th April
PostPosted: Sun Apr 14, 2019 1:42 pm 
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Joined: Sat Dec 11, 2004 8:18 pm
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Location: Manchester
Bob
I think it's nice that the Sun keeps us interested whichever part of the World we might be in !
When I saw the nice Sunspot several days ago, I then vaguely thought it might be a double spot - possibly (?) it might have been was light bridge ?
best wishes from Cliff


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 Post subject: Re: The SUN - 13th April
PostPosted: Mon Apr 15, 2019 2:22 am 
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Joined: Thu Jun 02, 2016 11:32 am
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Location: New Farnley, Leeds lat 53.8N long 1.6W
Cliff and all, April 15, update - at 0205 UT the light bridge was still visible, but fainter and more diffuse when the seeing steadied (between 1 and 2) and projected to a large image scale. 80mm f5 refractor, x2 Barlow, 10m eyepiece in white light. Melbourne, Aus. Maybe imagers could still catch it today? Best of luck, Bob


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 Post subject: Re: The SUN - 13th April
PostPosted: Mon Apr 15, 2019 6:47 pm 
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Joined: Sat Dec 11, 2004 8:18 pm
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Location: Manchester
Bob
Arguably it's been a very nice day here (15th April), though cool. However, apart from the drifting fluffy clouds, the sky was extremely milky with a veil of thin cloud. Ordinarily I probably wouldn't have bothered to observe & image but because I wanted to at least confirm the location of the big Sunspot, so I had a go just imaging in Ha at about 15:00UT. The penumbra seemed a bit distorted - slightly bulging out on its N-W side. The Umbra was also a bit distorted with a slightly less dark patch on the spots N-E sector extending across the N-E part of the paler penumbra. I didn't get any confirming evidence of the light bridge - but think that possibly because of the poor sky conditions.
Best of luck from Cliff


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 Post subject: Re: The SUN - 13th April
PostPosted: Tue Apr 16, 2019 12:08 am 
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Joined: Thu Jun 02, 2016 11:32 am
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Location: New Farnley, Leeds lat 53.8N long 1.6W
Hello Cliff, I can confirm your impression at 2350 UT today, 15th April. There is still a lighter sector within the umbra, diffuse and extended, not central but a sensibly lighter brownish tone than the majority of the (black) umbra and containing a small, much brighter patch. No other spots seen. 80mm refractor f5, x2 Barlow, 10 mm eyepiece, in white light, by projection to a large scale; seeing 2, transparency 2; Melbourne,Aus. Hope you get a clearer spell, Bob


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