Category: Solar log

Monday, November 08, 2004
Sunspots 667, 669, 671 and 672

In the early morning of September 10, about 09.00 hrs UT I started my solar observing session. The sky was deep blue and transparent. For my visual observing I used the TAL 100RS 4-inch refractor and the 32mm Televue Plossl eyepiece. The filters I used were

Posted by Math on 11/08 at 03:01 AM | filed in: Solar log | Print
Sunday, November 07, 2004
Photographing the Sun with different filters

On September 9 2004 I tested the Photographic and the Visual Baader Astro Solar Screen while shooting some images of the sun. All images where shot with the Nikon Coolpix 4500, mounted on the TAL 100RS 4-inch refractor and

Posted by Math on 11/07 at 03:01 AM | filed in: Solar log | Print
Saturday, October 16, 2004
Sunspot group 667

On September 4 2004 I observed the sunspot group 667 from 08:00 UT until 10.30 UT with the four inch refractor, the Baader ND5 full aperture filter, and three other Baader filters, the Fringe Killer, Continuum and Contrast Booster. Again with a

Posted by Math on 10/16 at 08:09 AM | filed in: Solar log | Print
Saturday, October 09, 2004
Sunspots 661, 662, 663, 664 and 665

On August 22 I observed the Sun for an hour from 14.15 UT till 15.15 UT. For visual observing I used the 4 inch TAL refractor with a full aperture ND 5 Solar Screen, the Fringe Killer and the Contrast Booster.  Before shooting the images I added

Posted by Math on 10/09 at 10:28 AM | filed in: Solar log | Print
Monday, August 16, 2004
Sunspot 656

During the last few days I have been observing sunspot 656. I also shot some images. While processing the images I noticed that I really miss a good observing form for the sun as well as a registration form for the image data (how where the images shot and processed).  Yesterday I created the some forms to log all the relevant data of the images I shoot. This should help me to get a better evaluation of the images. Anyway, here are a few nice shots I took. The first image, a close up of sunspot 656, was shot on Wednesday the 11th of August; the second was shot on Sunday the 15th of August. On the second shot you see sunspot 656 near the limb of the Sun.



The images where shot using the 4 inch TAL 100RS refractor. On Sunday I compared the views of the 4 inch refractor with the 8 inch Klevtzov Cassegrain. The images through the 4-inch where definitely sharper and had more contrast. A small sunspot, nr 657, was invisible with the 8-inch, while the 4-inch clearly showed this small dark spot. The 8-inch had much more trouble with the bad seeing conditions. 

Posted by Math on 08/16 at 03:27 AM | filed in: Solar log | Print
Thursday, July 22, 2004
Big sunspots visible!

Yesterday there was a very big group of sunspot visible (nr. 0652). In the early morning while the sun was rising through the mist it was even visible to the naked eye (use eclips-shades!). The group looks spectacular through the telescope at all magnifications!

Later that day I shot some .....follow this link to read the full story

Posted by Math on 07/22 at 04:01 AM | filed in: Solar log | Print
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