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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

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Telescopic comet Arend

12.9.2015 at 01.26 - 01.54 - Orimattila, Artjärvi, Tähtikallio (I)
Samuli Vuorinen, Kari Laihia, Veikko Mäkelä, Hannu Määttänen

Kari Laihia, Veikko Mäkelä and Hannu Määttänen filmed a very dim comet on the Tähtikallio Alluna telescope on the first night of the DS meeting. The comet was not yet found at the shooting stage, but the correct location was photographed based on the star map. Samuli Vuorinen's reading of the pictures then revealed that a dim haze was found. In the main image of the observation, the partial exposures are aligned according to the comet, in the second image according to the stars. Unfortunately, the flat calibration images could not be taken, so there was some unevenness and dust balls left ...

Images: 2 pcs • Comments: 2 pcs

Starscape image

11.9.2015 at 22.00 - Orimattila (IV)
Samuli Vuorinen, Kirkkonummen komeetta

Ursan Tähtikallio once again spent time under the stars in the sign of the DS meeting. Attached to the observation are pictures from Friday night. There will also be a timelapse video on YouTube from Saturday night.

Images: 8 pcs

Active aurora band

28.8.2015 at 22.50 - 01.20 - Helsinki (III)
Samuli Vuorinen, Kirkkonummen komeetta

I was in Pajamäki's Patterimäki in the northern lights, and at about 22:50 a dim northern arc began to appear on the horizon. It was not until about 11:20 p.m. At midnight, the northern lights dimmed into a steady gauze on the horizon. I was still waiting to see if anything would happen, but after one I went home to rest.

Images: 7 pcs

Rare halos

25.7.2015 at 16.10 - 16.55 - Helsinki (IV)
Samuli Vuorinen, Kirkkonummen komeetta

A huge pyramid hall play was on display today! I blinked out of the homework holiday when there was a promising looking cloud cloud in the sky, and the sky was like a moderately bright 22r. I grabbed a couple of pictures with the camera and a fisheye, and noticed on the camera screen that there was an insanely bright 9 degree ring around the sun. I set out to pick up a lot of momentum and bang other sky forms of pyramids. The play lasted less than an hour in its entirety. The content of the images is as follows: 1. A single image of the beginning of the play 2. A trusted version of the main im...

Images: 6 pcs • Comments: 6 pcs

NGC 4565

8.4.2015 at 21.30 - 01.30 - Kirkkonummi (IV)
Samuli Vuorinen

I photographed Puck Galaxy NGC 4565 from Komakallio last night. This seems to be the last night of the spring season. The astronomical darkness didn’t start until after 11 p.m., and on weekday evenings it couldn’t be shooting all the way to “the pin,” so the total exposure time was less than two hours.

Partial solar eclipse

20.3.2015 at 12.10 - 13.20 - Espoo (IV)
Samuli Vuorinen, Pollux, Aalto-yliopisto

The Xqrsiot of Polytechnics' Outer Space and Near Space, or POLLUX, organized a blackout event at Alvar Square in Otaniemi. Coincidentally, there was also another student event, with which the blackout received a lot of attention. I didn’t get to the scene myself until about 1:10 p.m., but I immediately started shooting despite the moderately thick cloud curtain.

Images: 2 pcs

All-sky aurora

17.3.2015 at 19.35 - 02.00 - Helsinki (V)
Samuli Vuorinen, Kirkkonummen komeetta

In the early evening, all the northern lights forecasts were in red, and I left for nearby Patterimäki with the camera at about 19:35. As soon as I stepped out the ladder door, despite the glow of the street lights, I saw bright northern lights in the northern sky, even though the sky was still bright at dusk. I would run around to get to a slightly darker spot before the northern lights fade. At the top of the hill I still had time to see a bright warp for a while and I even got a few pictures. Seeing the bright northern lights from the pale evening sky was an impressive experience. The occas...

Images: 8 pcs


14.3.2015 at 23.00 - Kirkkonummi (III)
Samuli Vuorinen, Kirkkonummen komeetta

The group was again enjoying the clear weather at Komakallmi in Kirkkonummi. I exposed this spiral galaxy for a total of three hours. The transparency was not quite as good as the previous nights.


12.3.2015 at 22.00 - Kirkkonummi (IV)
Samuli Vuorinen, Kirkkonummen komeetta

I photographed this spiral galaxy in Hounds for two nights, Wednesday and Thursday. Pretty nice picture it finally came! The image and its more detailed information can also be found on Astrobin .

Comments: 4 pcs


16.2.2015 at 22.00 - Kirkkonummi (II)
Samuli Vuorinen, Kirkkonummen komeetta

I had time to photograph this dark mist hiding next to Phi Taur just a couple of hours before it fell behind the trees. Surprisingly well, the subject captured with such a short total exposure time. I will continue the exposures as long as the weather allows.

Comments: 2 pcs

Binocular comet Lovejoy

16.2.2015 at 20.44 - 21.34 - Kirkkonummi (III)
Samuli Vuorinen, Kirkkonummen komeetta

I photographed the Comet for a while in the early evening while a lot of star-screen guests roared at the observation site. Even such a short animation shows a surprising amount of life in the comet's tail! The image can also be found on Astrobin .

Images: 2 pcs • Comments: 3 pcs

IC 1848

5.1.2015 at 22.00 - Kirkkonummi (V)
Samuli Vuorinen, Kirkkonummen komeetta

This winter, good weather has been rare. However, I photographed this subject as well on 26.12. that yesterday, 5.1. The last night there were filming slightly disturbed by the full moon. I compiled the images using PixInsight, a mosaic of such two screens. The target is a large emission nebula in the constellation of Cassiopeia. The subject is often also called the Soul Mist, or Baby Mist. The image field is about two degrees wide in this mosaic. I connected the observation to both the SII + Ha + OIII color image and the Ha image alone. Larger versions of both images can be found on Astrobin:...

Images: 3 pcs • Comments: 3 pcs

Several halo forms

29.12.2014 at 11.26 - 11.26 - Espoo (II)
Samuli Vuorinen, Pollux, Aalto-yliopisto

A sun pillar formed on the ice mist, side suns and crystal flicker were visible even below the sun.

Images: 2 pcs

IC 434

27.12.2014 at 01.00 - Kirkkonummi (IV)
Samuli Vuorinen, Kirkkonummen komeetta

After a three-month cloudy season, I finally got to photograph Kirkakummi's Komakallio again. I photographed another subject in the early evening, but after Orion rose higher, I started filming the Horsehead Fog. However, I only had time to shoot for a moment, and the project needs to be continued again. I didn’t get enough collected data yet to get a sensible color image of this, but I’ll divide at least this stack of two sub-exposures at the wavelength of hydrogen alpha.

LDN 1235, VdB 149 ja VdB 150

30.9.2014 at 23.00 - Kirkkonummi (III)
Samuli Vuorinen, Kirkkonummen komeetta

Once again on Komakallio spending a clear night. There was an early wake-up call to work in the morning, so I couldn’t be filming any longer at 2:00. The weather would have been longer.

Comments: 4 pcs

NGC 6914

27.9.2014 at 22.00 - Kirkkonummi (IV)
Samuli Vuorinen, Kirkkonummen komeetta

The weather again allowed a few hours of shooting session on Komakallio, and the last technical problems were solved, so I took this reflection fog in the constellation of Swan. More information can be found on Astrobin .

Comments: 6 pcs

Starscape image

19.9.2014 at 23.00 - Orimattila (IV)
Samuli Vuorinen, Kirkkonummen komeetta

On the first night of Ursa’s DS meeting, the weather was favorable and a month away from disturbing. The Milky Way was perfectly visible until late at night.

Images: 4 pcs • Comments: 4 pcs

IC 1318

13.9.2014 at 23.30 - Kirkkonummi (IV)
Samuli Vuorinen, Kirkkonummen komeetta

Last night I went to the Kirkkonummi Comet observation site in Komakallio to shoot despite the moon. Fortunately, with narrowband filters, spruce is not a huge drawback. There were few technical problems with focusing, resulting in significantly different exposures in different color channels. With H-alpha I got a pile of 55 minutes while with an SII filter I only got 15 minutes. However, the color image became quite procedural. The H-alpha data was of such good quality that I put it separately for this observation. I also included one 100% size close-up detail of the fog.

Images: 3 pcs • Comments: 3 pcs

Half-sky auroras

12.9.2014 at 23.00 - 02.00 - Helsinki (IV)
Samuli Vuorinen, Kirkkonummen komeetta

We were with Pauli Jokinen and Pyry Ekholm on the northern lights at Malminkartano peak. We arrived about ten or shortly after, but it wasn’t until 11pm that the camera images started to show greenery. The show remained quite muted throughout the evening, although gauze and a few rays were visible to the naked eye from the cracks in the clouds. At about 1:30 the rays expanded to cover the entire northern sky and the highest rose to zenith but remained very dim.

Images: 8 pcs

IC 1396

6.9.2014 at 23.30 - Kirkkonummi (IV)
Samuli Vuorinen, Kirkkonummen komeetta

Despite the moon, I was able to gather just under a couple of hours of exposure from this “elephant’s snake” of Cepheus alongside the equipment adjustments before the fog began to degrade visibility.

Comments: 12 pcs

Search result contains observations from time period 1.1.2000 klo 00.00 - 22.11.2015 klo 13.05.