Contact information

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

Ursa Astronomical Association

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Rare halos

27.3.2022 at 12.10 - 13.00 - Hausjärvi, Ryttylä (IV)
Jukka Ruoskanen, Aapo Ruoskanen, Ursa (Etelä-Suomi)

In exchange for something. The 18 best inspired to go to a more open place to stack. With the exception of the 35 rings, all the shapes were visible to the naked eye, though certainly not with the clarity revealed by the stacks. The first two images are versions of the same stack, one drawn in darker and the other in light. There are also differences in USM settings. The skills are rusty, and otherwise they couldn't get the same stuff and the three-figure in the same picture. The next three images are also from the same situation, in the order of moderate USM, tear-USM, and tear-BR. Dust. ...

Images: 5 pcs

Rare halos

27.12.2021 at 10.30 - 11.15 - Hyvinkää (IV)
Jukka Ruoskanen, Aapo Ruoskanen, Ursa (Etelä-Suomi)

Ajelimme sunnuntaina ja maanantaina tykkihalojen perässä Kalpalinnassa ja Hyvinkäällä. Sunnuntaina näytös oli saman kaltainen kuin tässä raportoitava maanantain näytös. Intensiteetti oli sunnuntaina huomattavasti vaatimattomampi, eikä edes Moilasen esiintyminen motivoinut kuvan ottamiseen. Maanantaina 27.12. sen sijaan intensiteettiäkin löytyi ja kaivoimme kameran esille. Alasivuauringot olivat muuten poikkeuksellisen hyvät - saatoimme ihastella melko kiinteitä väriläisikiä ihan maan pinnalta käsin. Oheisessa kuvassa on 30 kuvan pino, jossa usmia on käytetty jonkun verran. Kuvan alaosa on siis...

Several halo forms

15.7.2021 at 11.00 - Taivalkoski (II)
Jukka Ruoskanen, Aapo Ruoskanen, Ursa (Etelä-Suomi)

A lone horizon ring was visible in the sky. Later, the photographs show that very dim conventional shapes were also present, but before the appearance of the side suns visually, for a moment there was a situation where only hr was in the sky. We thought we saw the 120 ° side suns a couple of times, but these beliefs were so fragile that this time they go unmarked.

Images: 3 pcs

Rare halos

14.7.2021 at 19.30 - 19.55 - Taivalkoski (IV)
Jukka Ruoskanen, Aapo Ruoskanen, Ursa (Etelä-Suomi)

In addition to heating the sauna, we noticed a great ZYK in the sky. Soon, something between 22 ° and 46 ° also began to take shape. The tile-crystalline nature of the play led thoughts in the direction of Upper Lowitz, of course Parry was an obvious option. However, it can be seen from the pictures that this is not the case with Lowitz. The identity of the arc is not yet confirmed, because the constellations taken with this fisheye were not found on the hard disk for this emergency and thus an accurate measurement is lacking. Options are Upper Concave Parry or 23 ° Upper Parryel. The simulati...

Images: 3 pcs • Comments: 4 pcs

Rare halos

16.1.2021 at 10.10 - 10.40 - Janakkala (IV)
Aapo Ruoskanen, Jukka Ruoskanen

We set off after sunrise to check on the ice mist situation. A thick cloud crackled ten kilometers west of Kalpalinna until it began to thin out and turn into ice crystals. We stopped to photograph Moila. Jukka set up the camera to take the stack when Aapo announced that he had another V on top of Moilanen! The existence of the second V was confirmed at home as the stack got tired. This is probably an "alternative Moilanen," because the probability of a reflected Parry is reduced by the fact that no Parry or column shapes were available at all. Later we still admired the elegantly dense unders...

Images: 4 pcs • Comments: 7 pcs

Rare halos

29.12.2015 at 22.30 - 23.10 - Janakkala (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

A display induced by the cannons of Kalpalinna. Moilanen's arc was quite dizzying. I took plenty of crystal samples at the best stage. In Figures 4-7, I have assembled interesting crystals that have been thought to be responsible for the formation of the Moilanen arc. By the way, Figure 8 shows only interesting cases, some of which are probably crystals containing pyramidal facets. In the crystal images, the scale is the same in all: the dimension of the "small square" is about 100 μm. This was a typical halok night: a couple hundred miles into the glass as they pounded from place to place...

Images: 8 pcs • Comments: 6 pcs

Rare halos

29.12.2015 at 12.00 - Hyvinkää (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

Old decent cable hall - now in the Sun. Notice the bright area (square image) next to the counter-solar curves by the power line. What is the possible light transmission in those crystals? Would it be similar to a horizon ring or pillar, or even diffuse light flow.

Images: 4 pcs • Comments: 9 pcs

Rare halos

29.12.2015 at 11.30 - 12.00 - Hyvinkää (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

Ice trucks came and went - the best moments lasted only a few tens of seconds. Crystals rained on the lens so there are nasty dimmer images in the pictures, I'm sorry. I’ve managed to ruin my 8-millimeter on several trips so that artifacts are created on the edges of the image area to see if any film is damaged. In the second picture, I have marked with these arrows these bluish-light lines, which are therefore not halos.

Images: 5 pcs

Rare halos

27.12.2015 at 19.30 - 02.00 - Hyvinkää (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

In an ice fog hunt in Hyvinkää. The crystal came evenly, and the halos actually appeared non-stop for several hours in a small geographical area. Moilanen's arch was fine, but otherwise the rarities could not be enjoyed.

Images: 8 pcs

Rare halos

8.12.2015 at 19.30 - 21.30 - Rovaniemi (IV)
Jukka Ruoskanen, Marko Riikonen, Ursa (Etelä-Suomi)

In an ice fog hunt in Rovaniemi. We got three situations: Picture 1: 20.01, Chalet Hotel car park (stack of 4 pictures). Figure 2: 20.50, Boat landing on the banks of the Kemijoki River (stack of 8 images). Picture 3: 21.00, on the bank of the Kemijoki river (stack of 11 pictures). Light below the horizon. Figure 4: 21.06, on the banks of the Kemijoki River, single square. Light below the horizon. Figure 5: Crystals from the moment of taking the first image. Figures 6-7: Crystals from the moment of the second image.

Images: 7 pcs • Comments: 5 pcs

Glooria artificial lightsourcessa

29.10.2015 at 21.40 - Hausjärvi (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

In the car's spotlight, I decided to check the number of interference arcs inside the fog arc. after all, there would be two witches. The first of the interference arcs was clearly visible to the naked eye. There is also one weak interference arc outside the side arc. The straw stalks in the field were already glistening as a result of the freezing of the water droplets. However, no proper halo was formed.

Sumukaari Kuulla

29.10.2015 at 21.30 - Hausjärvi (III)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

The fog began to develop as early as sunset. I decided to take a look at the Moon's arc, and that's where it was with its interference arc.

Comments: 2 pcs

Rare halos

6.1.2015 at 11.00 - Hausjärvi, Ryttylä (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

There were comfortably crystals in the air after sunrise. I would swing out. Notes: - At the time of the appearance of the Moilanen arc, there was not even a lower sun, let alone ZYK or sub-side suns - I interpreted the arc rising from the side suns as Lowitz and not Schulthess, because there were no phenomena that needed end points. Later in the day, the lower sun also appeared (hence it is on the list). The upper part of the attached photo is stacked on 30 squares (with Panu Lahtinen's Halostack) and is stitched with a blurred mask. The bottom is a single box.

Comments: 2 pcs

Rare halos

10.7.2014 at 15.30 - Oulu (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

Marko Riikonen and I noticed 23 upper parishes in the sky on Oulu Market Square. Soon 18 eyes were also struck by the eyes, the parcel clearances on the sides of which were almost non-existent, but still visible. I grabbed a few snapshots, one of which is attached (above, organic, below with a blurred mask). I apologize for the stains in the picture caused by the debris on the glass surfaces and the cell. At the airport at 4.30pm, the show had already weakened to non-existent.

Images: 2 pcs • Comments: 2 pcs

Halo phenomena covering the sky

14.5.2014 at 08.15 - 09.30 - Hausjärvi (V)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

It was a real halo morning. I was just going on a business trip in the direction of Tampere, and I really had little time to shoot. Pictures 1-3 were taken in Hausjärvi and 4-8 on the way to Tampere. Warning: believed images do not represent the most aesthetic output of nature photography, but are processed to highlight interesting effects. Notice the rather nicely developed blue line, especially in the square image.

Images: 8 pcs • Comments: 4 pcs

Rare halos

17.4.2014 at 16.15 - Hausjärvi, Ryttylä (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

In the morning, I missed a great halo play when work duties were one hundred percent blocking the sky. In the afternoon, after all, I had already gotten into the open air, and immediately felt strongly like an elliptical halo. There were plenty of AC Lenticularis in the sky, and the middle clouds "disintegrated" little by little. Among the strong fog, I saw an ellipse, but as usual in recent years for ellipses, the camera was still not included. Only a small spark of hope for the possibility of photography kept the gas foot on the floor. I still got to the camera when the phenomenon was reason...

Images: 3 pcs • Comments: 4 pcs

Rare halos

8.4.2014 at 15.40 - Hausjärvi, Ryttylä (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

Parry's arch slid over the top side. I snap a couple of pictures. Later, the tile crystal halves dominated, and each cloud cloud gave birth to very spectacular side suns, and as they drifted from the right place, they were also illuminated by the light flow of 120 side suns.

Images: 4 pcs

Moon

31.3.2014 at 20.25 - Janakkala (II)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

I went to observe the young Moon. The age at the time of observation was about 22h40m. Easily visible with binoculars, but not with the naked eye.

Comments: 7 pcs

Rare halos

4.2.2014 at 09.00 - 19.00 - San Pedro de Atacama, Chile (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

A special halo was visible throughout the day. Pyramid stuff was actually involved all the time. The 23 upper parishes were constantly visible and right at noon I thought I saw the 23 lower parishes. I enjoyed filming every now and then, and here are a few examples. The thickness of the halos is special.

Images: 4 pcs • Comments: 6 pcs

Zodiacal light

2.2.2014 at 05.58 - Bolivian Altiplano (IV)
Jukka Ruoskanen, Ursa (Etelä-Suomi)

The SUV tire burst in the middle of the desert, and I felt like my opportunity had come when already three guys started the tire change trees. I picked up a fisheye and snapped all-sky pictures at almost 5km altitude on the Altiplano in Bolivia. The low Venus was so bright that it disturbed the view of the sky in all its glory! With the naked eye I tried to reach the zodiac light, but the lack of adaptation of the eyes seems to prevent this. Now, after looking at the photos, I noticed a clear zodiac light along the ecliptic. This is the first of its kind for me.

Comments: 6 pcs

Search result contains observations from time period 1.1.2000 klo 00.00 - 4.7.2022 klo 00.36.