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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

8 observations and 1 comments in queue.

Only observations that have a description and at least one image attached.

Jupiter

25.3.2015 at 22.45 - Joensuu (V)
Tero Parkkonen

I suspected the weather tonight due to the -11C frost, which rose unexpectedly after zero temperatures. However, I punched the telescope and after less than four hours went to see what it looked like. It didn’t take long to look into the eyepiece as I was already digging the camera to cool down and after that I once again took a series of pictures that showed well the rotation of Jupiter and as a bonus of course the GRS on display. Seeing for the observation, I mark only mediocre, although Jupiter did not move on the cell at all, there was a bit of fog / moisture in the air eating the best acc...

Jupiter

16.3.2015 at 22.00 - Joensuu (III)
Tero Parkkonen

Hard were the promises made by meteoblue (seeing index1 = 5 index2 = 4) but the reality was fiercer. Pretty much average averaging, maybe a little worse than what I’ve been used to in recent years, but it did bring about that animation of Jupiter’s rotation. The animation also shows very well how much seeing varies during the shooting session (25 approx. 70s videos) between 22:00 and 23:00.

Jupiter

29.1.2014 at 00.37 - 01.00 - Joensuu (III)
Tero Parkkonen

The third session of the evening produced such a result that something finally became clear about Jupiter. CPC11 is such a big pipe that less than three hours of cooling was not enough, but we had to wait for just over four hours in -15C frost. I tried twice before the last attempt and already meant to quit, but during the second attempt I noticed that the image had been significantly sharpened by just over half an hour from the previous attempt, so I went inside to take a break. The animation features 22 frames from 00:37 to 01:00 and once again shows the effect of seeing during the session a...

Comments: 2 pcs

Jupiter

4.12.2013 at 01.53 - Joensuu (III)
Tero Parkkonen

An addition to Jupiter's image I added here earlier on December 4, 2013, ie an animation created from the images obtained during the entire shooting session, which shows the effect of seeing and Jupiter's rotation between 01:53 and 2:36. It rotates quite quickly, ie you can shoot for about a minute at a time, so that the image does not start to rotate and the resolution decreases. This is probably the longest animation I’ve ever created of Jupiter. The gif loses a bit of image quality, but these go with it.

Comments: 8 pcs

Jupiter

4.12.2013 at 02.08 - Joensuu (III)
Tero Parkkonen

After a three-hour visual observation session, there were still bangs left when the weather seemed inevitable after a really bad fall / early winter. That is, a tube for imaging fitness and a Jupiter cell. I also photographed the six separately, which I then added to the same image as Jupiter because there seemed to be even a little detail visible in Ganymede. So in the picture Ganymede, Europa, Io and of course Jupiter himself (from left to right)

Comments: 3 pcs

Jupiter

28.11.2012 at 01.14 - Joensuu (IV)
Tero Parkkonen

After bad weather it happened to be just over an hour open in the sky tonight and the seeing also seemed to be quite good, meteoblue index1 = 4 and index2 = 2 so average / good seeing in Finland. In addition to Jupiter, the cell could accommodate Callisto (bottom) and Io (right).

Comments: 3 pcs

Moon

10.4.2011 at 20.00 - Joensuu (V)
Tero Parkkonen

A bit old picture already, but here's an ok shot of the moon taken with a Celestron CPC800 telescope and an Imaging Source DBK31 camera. The image consists of several different pieces because the field of view of the camera was very limited even with a focal reducer. Hopefully you can get the image here in maximum size so that its quality does not suffer, however the original size is somewhat (~ 9 megapixels).

Comments: 5 pcs

Jupiter

13.11.2012 at 03.40 - Joensuu (III)
Tero Parkkonen

Jupiter captured with a very strong and gusty wind (13m / s) with a new camera. Had to dodge some thin clouds, but luckily there weren’t very many of them so half of the material was usable. Meteoblue Seeing Index1 and Index2 = 1 so the resulting image was a big surprise.

Comments: 5 pcs

Jupiter

25.10.2012 at 02.58 - 03.50 - Joensuu (IV)
Tero Parkkonen

I was filming Jupiter the night between Wednesday and Thursday for the second time this fall, and I noticed at Stellarium a little earlier that Io was crossing Jupiter. I’ve once managed to capture a small snippet of Ion overflow and thought I’m trying to get some sort of animation of the event. I peeked into the telescope eyepiece before I started shooting and noticed that the Ion shadow was very clearly visible on the surface of Jupiter, so suddenly just the camera stuck in the tube and the sessions were upright.

Comments: 11 pcs

Search result contains observations from time period 22.10.2000 klo 13.08 - 22.11.2015 klo 13.08.