New activity on the Sun

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krakatoa1883
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New activity on the Sun

Post by krakatoa1883 » Wed Jun 20, 2018 12:21 pm

Hello

Today four active regions are visible on the Sun raising Wolf number to about 60. AR12713 is really hard to die, few days ago it seemed almost faded away, instead new small spots are still appearing. AR12714 changed a little between yesterday and today while activity in 12715 increased considerably, the leader spot has now a well defined penumbra although the group remains a modest one. A larger active area is now emerging from the E limb.

I made few discs with various filters and a close-up of AR12715 with K filter, unfortunately very disturbed by turbulence.

Thanks for looking!
Attachments
sun20180620_FD_WL.jpg
sun20180620_FD_WL.jpg (287.45 KiB) Viewed 233 times
sun20180620_FD_K.jpg
sun20180620_FD_K.jpg (403.74 KiB) Viewed 233 times
sun20180620_FD_CaH.jpg
sun20180620_FD_CaH.jpg (394.84 KiB) Viewed 233 times
sun20180620_AR12715_K.jpg
sun20180620_AR12715_K.jpg (144.18 KiB) Viewed 233 times
Raf
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ffellah
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Re: New activity on the Sun

Post by ffellah » Wed Jun 20, 2018 8:05 pm

Very nice and sharp disks, Raf. Great to see that there is more action on the sun now, more targets to shoot.

Franco

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marktownley
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Re: New activity on the Sun

Post by marktownley » Wed Jun 20, 2018 9:19 pm

Very nice indeed!
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Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Montana
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Re: New activity on the Sun

Post by Montana » Thu Jun 21, 2018 9:11 am

Super images, especially the CaH Quark :bow :hamster:

Alexandra

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krakatoa1883
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Re: New activity on the Sun

Post by krakatoa1883 » Thu Jun 21, 2018 12:42 pm

Thanks to all. Quark Calcium is a good device, I am very happy of it. May be it gives less contrast than the corresponding Ca-K modules by Lunt, but it costs less and doesn't have the oddities and the defects of the Quark Chromosphere and can be used with my solar newtonian also. Making some experiments with this device and my refractors I noted that although advertised for instruments as slow as f/7, Quark Calcium works best at more than f/10 and is really very fine around f/12-f/15, so for taking full disc pictures I stop down my 80 mm f/7 apo to 52 mm, for hires imaging I place a Barlow in front of it.

This morning I made some further images of the two main groups visible, AR12713 and 12715. I used my 150mm refractor at full aperture, 5x Powermate, Continuum and IR cut.
sun20180621_AR12715_cont.jpg
sun20180621_AR12715_cont.jpg (226.98 KiB) Viewed 173 times
sun20180621_AR12713_cont.jpg
sun20180621_AR12713_cont.jpg (204.68 KiB) Viewed 173 times
I tried again my K filter but I realised that for using it the seeing shall be really good otherwise images become blurred, I would say it requires to image the Sun within two hours from sunrise, after that the thermal turbulence becomes too high especially in a big city as Milan. This is the best I could obtain:
sun20180621_AR12715_K.jpg
sun20180621_AR12715_K.jpg (109.1 KiB) Viewed 173 times
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ffellah
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Re: New activity on the Sun

Post by ffellah » Thu Jun 21, 2018 1:39 pm

These came out great, Raf ! AR2715 looks excellent and interesting.

Franco

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Re: New activity on the Sun

Post by marktownley » Thu Jun 21, 2018 3:41 pm

Really nice images Raf! Good info about the CaH quark
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Montana
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Re: New activity on the Sun

Post by Montana » Fri Jun 22, 2018 7:01 am

Cracking WL :bow I know what you mean about Calcium imaging, has to be very very early!

Alexandra

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