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
Friday, October 08, 2004
Some great doubles revisited

On the night of September 3rd I revisited some double stars in Lyra with the TAL 200K. I started about 22.00 hours UT With the famous Double Double, Epsilon 1 and Epsilon 2 Lyrae. With the 32mm plossl (62x) Epsilon 1 and 2 where clearly split as a double star, but

Posted by Math on 10/08 at 07:49 AM | filed in: Deepsky log | Print
Monday, October 04, 2004
Two "stick men" and some other beautiful deepsky objects

On August the 21st I observed some deepsky objects with the 15x80 Vixen and the Sky Window. The objects I observed where Mu Cephei, M 52, NGC 7789, NGC 457, Stock 2 and The double cluster in Perseus.

Mu Cephei
I started with Mu Cephei, Herschel’s Garnet Star. After searching for half an hour I finally found it, using a printed star chart from TheSky. As you can see on the image below, Mu Cephei lies

Posted by Math on 10/04 at 09:59 AM | filed in: Deepsky log | Print
Thursday, September 30, 2004
Argo Navis digital setting circles

A few weeks ago I got my digital setting circles for the EQ 6 mount, the Argo Navis DTC (Digital Telescope Computer), manufactured by Wildcard Innovations in Australia. The Argo Navis DTC has 29.000 objects in its

Posted by Math on 09/30 at 06:18 AM | filed in: Equipment | 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, August 05, 2004
Lunar crater rays and Mare lavas

Last Saturday I spend the night with some fellow backyard-astronomers, observing a 15-day-old Moon. When the Moon is full (or almost full) you can observe the white crater rays very good. On the first of the images below you see the bright

Posted by Math on 08/05 at 02:01 AM | filed in: Lunar log | Print
Wednesday, August 04, 2004
Testing the Baader Fringe Killer and Continuum Filter

Last week I tested a few Baader filters with the 4-inch TAL refractor mounted on the EQ6. I only used the Baader Solar Filter (ND=5). I started with a 32 mm plossl. This eyepiece gives a magnification of 31x. The sun’s granulation was very easy to detect. The big group of sunspots (652) was near the western limb of the Sun. There where some

Posted by Math on 08/04 at 02:28 AM | filed in: Solar scraps | Print
Tuesday, August 03, 2004
July 31st: An orange Moon

On Friday night around 23:30 UT I shot some images of the Moon from my backyard. The 14-day-old Moon stood low above the southern horizon, and looked deep orange.


The colour image was shot with the Nikon Coolpix 4500 and the TAL 100RS (4-inch refractor) using a 20mm Vixen Lanthanum eyepiece.

After processing the image the contrast between the dark mare and brighter highlands become clearly visible.  In the Mare itself you can see darker and lighter patches of Mare material. The Tycho and Copernicus lunar rays are also clearly visible on the processed image.

The image was stacked and processed using Keith’s Image Stacker. I stacked 19 original images (1600x1200, 1/15s, f3.3, ISO 100, spot metering) into 1 new image. The image was processed using unsharp masking and some adjustment of levels/histogram.


Posted by Math on 08/03 at 02:00 AM | filed in: Lunar scraps | Print
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