Friday, September 09, 2005
Double rainbow
Two weeks ago I got my Baader Herschel wedge. I could not get my 4-inch refractor into focus using my 1.25 eyepieces. I could not turn the focusser inward far enough. Yesterday I visited a fellow observer who is going to shorten my TAL 100RS refractor by two inches. I hope that I can use the Herschel wedge with this "shorter" refractor. I will keep you updated. Just before leaving I shot this image of a beautiful (double) rainbow.


Posted by Math on 09/09 at 09:00 AM | (0) Comments | filed in: Atmospheric optics | Print
Friday, September 02, 2005
A night of open clusters and double stars
On Tuesday 30th of August 2005 I got the 8-inch TAL 200K out around 20.30 hrs UT. The sky wasn't as clear as on the last two nights, but for observing some open clusters and a few double stars it would be OK. I also had a go at Mars and M77, and I did a little test comparing my two broadband filters, the Baader Skyglow and the Lumicon Deepsky filters. Are they of any use visually?

Posted by Math on 09/02 at 05:29 AM | (0) Comments | filed in: Deepsky log | Print
Monday, August 15, 2005
Navigating the night sky
The Sky-Watcher EQ-6 mount and the Argo Navis Digital Telescope Computer

About a year ago I decided to get a new mount for my TAL 200K. The main reason was that I wanted a mount that could be equipped with some sort of go-to system or digital setting circles. I had been suffering from serious back-problems for quite some time, and I was fed up with kneeling down and crouching under my telescope to locate my favourite deep sky objects, especially in the cold winter period.

Posted by Math on 08/15 at 07:06 AM | (0) Comments | filed in: Equipment | Print
Friday, August 12, 2005
Enjoy the Perseids
Tonight I hope to enjoy my favourite (and one of the best known) meteor showers of the year, the Perseids. I enjoy meteor showers most just sitting in a reclining chair and try to see a few bright ones. I don't really count them, but then I'm not a really serious meteor watcher. On nights like these I like to behave a little like a tourist, strolling along the night sky with a pair of low power binoculars and enjoy the overall naked eye-view. If your out tonight and have your (preferably low power) binoculars with you, be sure to have a look at one of the most beautiful star associations for binoculars, Melotte 20 or the Alpha Persei Association.

Even with 50mm binoculars you should be able to count between 30 and 40 stars of various magnitudes. Under real good conditions you can see as many as 50. The map below should give you an idea where to look tonight for Melotte 20 and the Perseid meteor shower. Click on the image to enlarge.


Image from SkyTools 2 by CapellaSoft

Good luck with the weather! The sky is clearing around here, so maybe I can see a few Perseids tonight.

Posted by Math on 08/12 at 12:08 PM | (0) Comments | filed in: Solar sytem scraps | Print
Sunday, July 31, 2005
Large prominence
At the moment there is a big prominence visible as well as the active region AR 792. Here are some images from some two hours ago (click to enlarge!)

image image

Enjoy the images for now. Details on the images will follow within the next few days. I will keep you updated.

Clear skies
Posted by Math on 07/31 at 09:19 AM | (1) Comments | filed in: Solar scraps | Print
Friday, July 29, 2005
First H-Alpha pics!
Yesterday morning the seeing seemed to be good. The Sun revealed a great number of details in the PST. There where filaments, prominences, plage's, and active regions visible. I also had a chance to use a wide array of eyepieces ranging from 20mm to 5mm (all Vixen Lanthanums. The different views were fascinating. I also shot some images with the Nikon Coolpix 4500, which I include in this observing report. I also fiddled around with adjusting the images in different colour channels. It produced some interesting results that form a base for future improvements.
Posted by Math on 07/29 at 03:50 AM | (4) Comments | filed in: Solar log | Print
Wednesday, July 27, 2005
Deepsky Top-100 (16): Beautiful Albireo
In my list of favourite deepsky objects for suburban backyards you will find only a few galaxies. Because of the severe light pollution these delicate structures with low surface brightness visually loose almost all detail or, even worse, aren't visible at all through my 8-inch telescope. I compensate this by adding some beautiful stars, double stars and multiple stars to my Deepsky Top-100.

Posted by Math on 07/27 at 01:17 PM | (0) Comments | filed in: Deepsky TOP 100 | Print
Tuesday, July 26, 2005
Observing the Sun in H-Alpha
Observing the Sun in H Alpha

If you are a beginning solar observer like me, or you consider becoming one, you maybe asking yourself: what can I see on the Sun when observing in H-Alpha with a special telescope like for instance the Coronado PST. I found this wonderful article by David Knisely, Observing the Sun in H-Alpha, on the web last week. In this article, David not only shows some great images that let you see what to expect when observing the Sun in H-Alpha, he also explains all the different features like prominences, filaments, active regions, flare's, plage's and others you might observe. follow this link to read David's article.

Posted by Math on 07/26 at 03:28 PM | (0) Comments | filed in: Hot links! | Print
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