Contact information

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

Ursa Astronomical Association

4 observations and 0 comments in queue.

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

Zodiacal light

20.3.2020 at 20.50 - Naantali (I)
Sakari Ekko, Turun Ursa

Seen from a cliff northeast of Naantali, there are no very bad sources of wasted light in the west, but light pollution from the east fades the sky so much that the zodiac light is barely visible in the picture - at least it seems to me. I couldn't tell it apart. Looking at the pictures later, I noticed distant northern lights together.

Images: 2 pcs • Comments: 3 pcs

Transit of mercury

9.5.2016 at 14.12 - 21.42 - Turku (IV)
Sakari Ekko, Turun Ursa

On the day of the crossing, Turku had great observation and shooting weather. My companion and I agreed that he would show the passage to those interested (everyone who came to the scene wanted to look into the telescope) and I would shoot. I took a series of pictures every 20 minutes and a few more, Kuta's series Mercury's print in front of the Sun. In Turku, the overpass was completely visible in theory, but in practice Mercury disappeared into thermal vibration a few minutes before the end of the overpass, as the Sun was below one degree. Combining a series of images turned out to b...

Images: 3 pcs • Comments: 1 pcs

Sun

9.6.2022 at 00.49 - 01.52 - Enontekiö (IV)
Sakari Ekko, Turun Ursa

It was an unusually bright night, and the scenery wasn’t even funnier - so I decided to monitor to get a classic midnight sun image. The tent should have been set up in the picture area, so there would have been little life in the landscape.

Starscape image

9.9.2018 at 00.28 - 00.38 - Enontekiö (IV)
Sakari Ekko, Turun Ursa

The Milky Way visible in the whole of Enontekiö at the beginning of September in three pictures. The waste light is small, although the distance to the west to the center of Enontekiö (Hetta) is only 9 km and to the east to the village of Vuontisjärvi by the same amount. The wasted light from the street lights of Lake Vuontisjärvi would hardly stand out if there was no low cloud at them. The green in the lower left corner of the last image is the northern lights.

Images: 3 pcs

Starscape image

10.10.2018 at 20.45 - 20.58 - Mynämäki (III)
Sakari Ekko, Turun Ursa

At the request of the northern lights, I spent the night in Kurjenrahka National Park. There were quite modest northern lights on the north side, but the starry sky over the old forest was more impressive. The Milky Way was otherwise well visible, but its lower part was dimmed by the waste light.

Images: 3 pcs • Comments: 1 pcs

Starscape image

5.3.2019 at 21.53 - Turku, Ruissalo (III)
Sakari Ekko, Turun Ursa

I tried a new tik-tak tracking device in Saaronniemi, Ruissalo. The image is combined from two images: the starry sky is exposed for 279 s with an aperture of 2.8 ISO 200, the landscape for 45 s with an aperture of 2.8 ISO 400.

Comments: 3 pcs

Starscape image

13.2.2020 at 19.57 - 23.49 - Muonio (IV)
Sakari Ekko, Turun Ursa

The night in the desert hut provided a starry sky, but the northern lights were just greenery on the northern horizon. The pictures were captured by the shy Orion, the Milky Way balancing on the top of a spruce tree and a desert hut with almost one and a half meters of roofing snow throwing under Otava. Note. In the second picture, the camera was in summer time.

Images: 3 pcs

Starry sky image

24.10.2017 at 04.15 - Yläne (III)
Sakari Ekko, Turun Ursa

One question I often hear is, "What is that bright star down near the horizon that flickers in all the colors of the rainbow?" Usually it is Sirius whose light is scattered like a prism by the variation of atmospheric refraction. I experimented with what Sirus looks like when photographed from the arm with a multi-second exposure. There were quite interesting looking and colored patterns.

Comments: 5 pcs

Starry sky image

6.2.2019 at 20.19 - Enontekiö (IV)
Sakari Ekko, Turun Ursa

Above Lake Ounasjärvi, the -25-degree frost had developed a suitably thin frostbeam, which spread the image of the brightest stars enough to make the colors visible. The lower part of the picture is darkened by fog.

Several halo forms

7.5.2014 at 12.05 - Turku (II)
Sakari Ekko

A rare, distinctive 22-degree tire in the Turku sky.

Comments: 1 pcs

Secondary rainbow

27.7.2013 at 19.20 - Utsjoki (III)
Sakari Ekko

Having recently been admired mainly by the clouds, I came to examine a rainbow image from last summer showing an interference arc and a side rainbow. What caught my attention was that the distance between the side and main rainbow is not constant and the main rainbow does not look like a circle. If the interference arcs are caused by flattening of appropriately sized droplets, the main rainbow should also be slightly flattened at the apex (David K. Lynch & William Livingston: Color and Light in Nature, pp. 119-121). In the second image, I cut a circular section from the original. The image is ...

Images: 2 pcs • Comments: 1 pcs

Rare halos

8.2.2017 at 09.50 - Muonio (IV)
Sakari Ekko, Turun Ursa

I haven’t seemed to see a more colorful side sun or a brighter sun pillar below before. The weather was calm and the top of the ice mist clear. When I left, the temperature at the foot of the fell was -21 C; at the top it felt a dozen degrees warmer - the thermometer was not included. The phenomenon lasted more than an hour. I have not touched on colors in image processing.

Images: 2 pcs • Comments: 4 pcs

Quiet aurora band

4.2.2018 at 20.49 - Enontekiö, Hetta (II)
Sakari Ekko, Turun Ursa

The Fell-Lapland Nature Center near Skierri, on the ice of Lake Ounasjärvi, is a good place for skies. To the south, there is no wasted light, and the village road lights are mostly left behind the forest strip. Shooting to the north is more difficult, but the northern lights were nicely visible both visually and in the picture. It was -35 C from the frost, and the defrosting of the fingers afterwards was downright painful. I started coming up with a camera handling tool that could use the buttons and dials of the camera to use gloves on. A dim red LED light on the same instrument would make i...

Quiet aurora arc

10.10.2018 at 21.54 - 22.32 - Mynämäki (II)
Sakari Ekko, Turun Ursa

A good weather and moderate raven forecast predicted me to spend the night in Kurjenrahka National Park. The northern lights were quite modest, but in between there were dim rays above a brighter arc.

Images: 2 pcs

Pollen corona

27.4.2019 at 20.55 - 21.10 - Eura (IV)
Sakari Ekko, Turun Ursa

The sunset on the kayaking trip provided a beautiful pollen ring.

Images: 2 pcs • Comments: 1 pcs

Partial solar eclipse

10.6.2021 at 12.40 - 15.15 - Enontekiö
Sakari Ekko, Turun Ursa

The weather favored the eclipse, only at the very last minutes a dull cloud dimmed the sun. I wonder the orbit of the Sun in the sky in a multi-exposure image, it’s like upside down. To my recollection, Pekka Parviainen answered his picture to the wonder of the orbit of the Sun, that by looking at the hula hoop from its center against the sky, he perceives the matter. The hula hoop didn’t come with me, so I have to ask myself wiser. Images are taken every 5 minutes and the background is photographed separately. The sun should be at its highest in the ninth or tenth image, i.e. around 13:20 but...

Images: 2 pcs • Comments: 1 pcs

Other atmospheric phenomenon

9.2.2019 at 14.49 - Muonio (III)
Sakari Ekko, Turun Ursa

Looking down from the top of Mustavaara into the light, the cannon spruce on the Lommoltunturi slope clearly had an opposition effect: it is as if the spruce had a clear lane opposite the Sun. A similar phenomenon causes a peak in the brightness of the Moon during the full moon when the shadows of the lunar surface irregularities do not hit the line of sight.

Comments: 2 pcs

Moonn kehä

8.11.2017 at 05.03 - Turku (IV)
Sakari Ekko, Turun Ursa

I was in a hurry when, as I picked up the morning paper from the box, I noticed a colorful circle around the Moon - and the cloud that caused the circle was just flying in front of the Moon. I had time to take a couple of pictures, but the focus had to be done a bit hastily. In image processing, I didn’t touch on color adjustments (“Vibrance” and “Saturation”), but I did control sharpness, exposure, and “Clarity”. Interestingly, the hoops are irregular. Is it due to a variation in the crystal / droplet size of the cloud?

Images: 2 pcs

Moon

13.8.2022 at 22.37 - 23.32 - Uusikaupunki (IV)
Sakari Ekko, Turun Ursa

For once, I happened to be in the right place at the right time, and the weather also favored shooting the moonrise.

Milky way

24.9.2017 at 21.00 - 22.00 - Turku (II)
Sakari Ekko, Turun Ursa

Tursa Ursa organized Bonga Milky Way evening in Ruissalo Saaronniemi on September 24. As you can see from the picture, there were a lot of people there. The weather favored the event, the Milky Way was visible to the naked eye, although the wasted light faded from the sky pretty much. Visitors received information about the starry sky and star hobby, as well as star photography guidance. Deep sky objects were also viewed with a telescope. The disadvantages of wasted light, and especially glare, did not need to be demonstrated, the bright lights of the beach, with considerable lateral leakage, ...

Images: 2 pcs • Comments: 3 pcs

Search result contains observations from time period 1.1.2000 klo 00.00 - 1.12.2022 klo 11.56.