Images of AR12706

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krakatoa1883
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Images of AR12706

Post by krakatoa1883 » Mon Apr 23, 2018 9:38 am

Hello

In the past few days I made some pictures of AR12706. The group is now declining, today I have counted only 11 spots most very tiny, yesterday they were 14 and on the 21st about 18. Some images are attached including a disc of today.

I had time to do some further experiments with Daystar Calcium Quark. The device is relatively insensitive to variations in tuning but I noted it is quite sensitive to the focal ratio. Although advertised for scopes as fast as f/7 I noted that it requires at least a f/10 cone to perform best, and still better to have something around f/11 - f/15.

Regards
Attachments
sun20180423_FD_CaH.jpg
sun20180423_FD_CaH.jpg (258.24 KiB) Viewed 346 times
sun20180422_AR12706_K.jpg
sun20180422_AR12706_K.jpg (178.35 KiB) Viewed 346 times
sun20180422_AR12706_CaH.jpg
sun20180422_AR12706_CaH.jpg (176.92 KiB) Viewed 346 times
sun20180420_AR12706_K.jpg
sun20180420_AR12706_K.jpg (113.02 KiB) Viewed 346 times
sun20180420_AR12706_Ha.jpg
sun20180420_AR12706_Ha.jpg (102.5 KiB) Viewed 346 times
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Re: Images of AR12706

Post by marktownley » Mon Apr 23, 2018 10:19 am

These are very nice images! They've turned out well. Interesting about how the CaH filter performs at longer focal ratios.
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Re: Images of AR12706

Post by ffellah » Mon Apr 23, 2018 11:37 am

Beautiful sharp images, Raf.

Franco

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Re: Images of AR12706

Post by eroel » Mon Apr 23, 2018 1:51 pm

Raf:
Very good images.
Regards,
Eric.

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krakatoa1883
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Re: Images of AR12706

Post by krakatoa1883 » Tue Apr 24, 2018 12:44 pm

Thanks! The group is now vanishing, the follower spot disappeared leaving only some "dust" behind. Here is how it appeared just one hour ago.

Best,
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sun20180424_AR12706_cont.jpg
sun20180424_AR12706_cont.jpg (192 KiB) Viewed 290 times
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Re: Images of AR12706

Post by marktownley » Tue Apr 24, 2018 12:51 pm

Thanks for the update!
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Re: Images of AR12706

Post by Carbon60 » Wed Apr 25, 2018 5:40 am

A very fine set of images, Raf.

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Re: Images of AR12706

Post by rsfoto » Wed Apr 25, 2018 3:32 pm

Stunning images
regards Rainer

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Re: Images of AR12706

Post by christian viladrich » Thu Apr 26, 2018 10:25 am

Nice set of images !
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Re: Images of AR12706

Post by ffellah » Thu Apr 26, 2018 10:36 am

A great addition, Raf

Franco

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