Contact information

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

Ursa Astronomical Association

1 observations and 0 comments in queue.

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

All-sky aurora

17.3.2013 at 19.58 - Helsinki, Pukinmäki (V)
Esko Lyytinen, Ursa (Helsinki)

The plans for the comet shooting changed in part when the northern lights appeared, although I was a little waiting for them to come. The picture shows a comet on the far left. 55mm F1.7, ISO 400, 1s. Canon EOS 400D EDIT: The time of the clock is roughly the time of the picture, when it suddenly brightened in the area and perhaps the brightest I noticed at all, but there was still almost no northern lights in the whole sky.

A fireball in a twilight sky

12.7.1969 at 21.00 - Vesanto (IV)
Esko Lyytinen, Ursa (Helsinki)

This is an old smoky leather observation from the 1960s, most likely in 1966 or 1967 on some early August, clearly before the Perseid era. The estimate of the calendar day (month, day) has now been made by comparing the darkening of the sky in the evening with the memories. At the time, I thought it was a rocket test on the Death Peninsula (Barents Sea), although I was already wondering about some of the features in it. I took pictures over the course of a couple of hours, with the wad spreading mostly north. Sometimes I thought one memoir was enough and I threw the others away. After seeing s...

Comments: 6 pcs

A fireball at night, as bright as a cresent moon

22.12.2011 at 22.59 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

It is obviously the same fireball that Jukka Höltä already observes. The fireball camera flashed a few times from the cloud openings and the video shows that a clearly brighter flash occurred behind the cloud. I attach a summary image. Shown in the picture on the right last on the very edge. And I also put a picture of the BTrail program showing the route (only part of the identification) and a backtrace track that is great for Ursidian radians, also in terms of speed. (There is the same color for the radiant as the radiant circle is marked).

Images: 2 pcs • Comments: 4 pcs

A fireball at night, as bright as a cresent moon

14.4.2007 at 23.13 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

This is an old observation of a fireball camera in the Haapamäki - Kärsämäki region, apparently from a fine fireball that dropped a few kilo-scale meteorite fragment, which was obtained in several fireball cameras. The image also shows the lattice spectra of the fireball on the sites. And I also put a graph on the spectrum. In it, the more easily identifiable emission spectral lines are the Na line just below 600 nm and the Mg line at about 518 nm. Otherly interfering with each other, there are apparently O-, Fe, and Ca spectral defects. Probably one of the few supposed meteorite dropers for w...

Images: 2 pcs

A fireball at night, as bright as a cresent moon

16.1.2012 at 00.45 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I got a picture of a fireball camera. The time in the identification was 00.45.04 (end). The duration was 2.5 s. It can be seen that a visual observation also came from this and was also seen in the Siuntio full-sky fireball camera. The general estimate is that the entry speed was on the slow side probably below 20 km / s and compared to it (and the brightness) has gone off quite high, at over 40 km. It would mean that only a ten-gram-class meteorite has been dropped, and there may have been several fragments of such (?) Perhaps there was weak material. Came down quite sharply The brightness (...

A fireball at night, as bright as a cresent moon

12.9.2012 at 23.14 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I got this final explosive "car" from my fireball camera, I didn't see it myself. Visual observation also appears to be the same: http://www.taivaanvahti.fi/observations/show/7805 Also came to another fireball camera. The entry speed of the sporadic meteor was about 30 km / s and ignited with an 86-kilometer test and exploded at 75 km, which is high relative to the speed. Apparently there was quite weak material. The exact time was 23.14.02. The duration in the detection was 0.67 s. EDIT: I still see an image observation. http://www.taivaanvahti.fi/observations/show/7817 This is not the on...

A fireball at night, as bright as a cresent moon

21.9.2012 at 03.35 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I got this on a fireball camera and I didn’t see it myself. I put on the brightness like a crescent that it estimated from here quite from a distance, answered. But looking closer, like Mikeli, for example, it must have been brighter than a full moon. http://www.taivaanvahti.fi/observations/show/8039 It was fast at well over 60 km / s and thus not a meteorite dropper. Exploded in about 80 kilometers. I put a video about Pukinmäki at: http://lyytinen.name/esko/bolid_20120921_003440UT.mpg

A fireball at night, as bright as a cresent moon

20.11.2013 at 21.53 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I didn’t (unfortunately) see the fireball and didn’t even get my camera under the clouds. I’m putting up a radio observation that shows a reflection of a Moscow TV picture carrier lasting about two minutes from an ionization cloud created by a fireball. Since there are many observations and probably interesting ones, I will also attach a map image made with the UFOOrbit program, which shows the route of the fireball and what part of it each camera considered in determining this was found. Some stations showed up on more than one camera, but have so far (so far) only utilized each one. He flew ...

Images: 2 pcs

A fireball in a twilight sky

2.2.2014 at 07.39 - Helsinki, Pukinmäki (IV)
Esko Lyytinen

I didn't see the event. Since (probably) the fireball has become a star of a lot of sightings, mostly flash observations, I checked the "sum pictures" of my fireball camera even though it has been under the cloud and probably wouldn't have looked west enough. 07.38 - 07.40 Peak-hold shows strong brightness compared to adjacent images. The image name has an end time of UT_time. I attach that image and the following image as a reference. Unfortunately, the video capture (opportunity) hadn’t been turned on because the evening seemed to be a cloudy night to come.

Images: 2 pcs • Comments: 54 pcs

A fireball in a twilight sky

19.9.2014 at 20.35 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I didn’t see the fireball, but got my fireball camera Peak-hold for snapshots and auto-detection. It’s in an almost rainy twilight sky so even though it was so bright that there was a spread mark, it was almost barely separable from the picture. I attach a fairly processed version to this to make it a little easier to stand out. So it appears in the shallow little to the left of the center. The duration of the recognition was 0.36 s, but apparently only the brightest phase was visible and entered the image and recognition. It is quite obviously the same fireball as the observation: http://www....

A fireball at night, as bright as a cresent moon

18.3.2015 at 21.02 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I didn't see it but I got my fireball camera. The duration of the automatic detection was a little over 10 s. Due to the trip abroad and the handling of four fresh fireballs, I only now have time to put my own observation on this;) It was among the first to be utilized. As fine as it was and there would be an excellent amount of astrometric and other data, it was so fast with its entry speed (29 km / s) that probably only a few little fragments survived to the ground. And there are so few terrains that you shouldn’t suggest looking to leave. When, for the sake of exploration, there is no n...

A fireball at night, as bright as a cresent moon

10.9.2015 at 22.49 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

Let me also put a fireball camera picture of this fireball that already has several reports, some with pictures. Personally, I didn't see this. There was a September Perseid raft. Its entry speed was about 70 km / s, ie from the highest end. And I estimate the maximum brightness as seen here as the level of the brightest Iridium flashes mag. -8 (?). The duration of the camera observation was about 1.4 s.

A fireball at night, as bright as a cresent moon

11.7.2016 at 00.54 - Vesanto (IV)
Esko Lyytinen, Ursa (Helsinki)

I didn’t see the fireball and isn’t on camera either. There is a radio-scatter observation, in this case a head-echo of the St. Petersburg TV picture carrier at 49.75 MHz. I attach a cropped image (in time) and 2x magnified. It is marked with a red arrow on that head-echo, which roughly ends at a carrier that is almost continuously detectable. The trajectory is followed (temporally) by a reflection from the "over-dense" ionization cloud at the carrier. And the area also shows a signal from a couple of other stations, a reflection, but no head-echo. Actually, only it can be used for making usef...

Comments: 1 pcs

A fireball at night, as bright as a cresent moon

12.9.2016 at 23.13 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

I got a fireball camera, I didn’t see the flight myself. Analyzing a few different camera images, it turned out that there is an SPE flock meteor, i.e. Sepetmber epsilon Perseids, usually called only September Perseids. And there are several other observations and pictures in the sky.

A fireball at night, as bright as a cresent moon

31.10.2016 at 18.24 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Helsinki)

There already seem to be several visual observations of this. I didn’t see the fireball, but I got to the fireball camera. The exact time was 18.23.30 and the duration was 1.4 s. The planes have made their own distracting footprints, but now did not directly distract this. I also attach a BTrail map image showing the route in the starry sky and the "rear extension" of the route with a color-coded rough speed estimate, assuming that the radiant is at that point. There may be a 525 meteor (?) On the IAU working list. The working list is therefore a list whose flocks are not considered secured. I...

Images: 3 pcs

A fireball in a twilight sky

28.4.2017 at 21.30 - Helsinki (IV)
Esko Lyytinen, Ursa (Helsinki)

There is a fireball camera observation, I did not see it myself. I already comment in the observation: http://www.taivaanvahti.fi/observations/show/63594 two or maybe three twilight fireballs seen at almost the same time. Here the sun was only 2 or 3 degrees below the horizon at the time and was visible quite on the sun side i.e. it was quite bright this one too. Was too fast to drop the meteorite. The exact time of this was 21.29.46 for its start. The duration in auto detection was 2.28 s, but was already bright when it came to the image area

A fireball at night, as bright as a cresent moon

8.11.2017 at 01.02 - Helsinki 72 (IV)
Esko Lyytinen, Ursa (Etelä-Suomi)

There is a fireball camera, I did not see. It was the first of two fireballs of the night, the second one flying much closer came exactly 3 minutes later. This came so exactly in minute 02 that it split into two 2 minute totals. For that reason, I put a 10-minute picture that shows the whole (every fifth frame). Did the exchange of images just confuse the recognition as there was no automatic detection. Can measure manually, but I haven't had time to do it yet. I set the brightness rating to mag. -8, but there might have been close to the brightness of the full moon at close range. The nor...

Comments: 4 pcs

A fireball at night, as bright as a cresent moon

9.1.2018 at 08.08 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Etelä-Suomi)

I didn’t see, I got my fireball camera through a tree branch. The exact time was 08.07.25 and the direction lost 348, at an altitude of 2.1 (degrees). It is estimated that it flew in the wigs of the Gulf of Bothnia, ie clearly north of the Kvarken with an entry speed of more than 30 km / s. Something "crumbs" may have come down all the way to the sea. It came pretty sharply from the east side.

A fireball at night, as bright as a cresent moon

27.3.2018 at 00.07 - Helsinki, Pukinmäki (IV)
Esko Lyytinen, Ursa (Etelä-Suomi)

I didn't see it, I got a fireball camera. It’s probably the brightest thing I’ve gotten on my camera in a few years. It was clear, but partly because it was pretty close. There are known images from six different stations. The entry speed was 25 km / s and went off at 29 km. It was so fast that there wasn’t much material left down. Probably disintegrated, and I don’t know how many larger head fragments there would be in number (not very much at least), but the largest ones are barely 10 grams larger if at all. So there is no need to look. According to estimates, what came down until it fel...

Comments: 6 pcs

Half-sky auroras

27.2.2014 at 21.10 - 03.40 - Helsinki, Pukinmäki (IV)
Esko Lyytinen

In the absence of light frequency observations, I put a radio frequency observation from the last northern lights. That is, it is an observation of radio meteor-scatter equipment from the reflection of a (analog) video carrier on Moscow TV from meteors and northern lights. The original observational images have been reduced to one-fifth of the original in terms of the time axis and compiled by image processing into seven rows, each with a good hour. Full hours are marked in red on the lanes. Minutes are also displayed (and ten minutes in green, but its color is probably not distinguished from ...

Comments: 4 pcs

Search result contains observations from time period 1.1.2000 klo 00.00 - 8.10.2018 klo 22.56.