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

Ursa Astronomical Association

2 observations and 1 comments in queue.

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

Telescopic comet NEAT

14.3.2020 at 23.49 - 00.08 - Orimattila, Artjärvi, Tähtikallio
Kari Laihia, Juha Blad, Christos Oscar Kambiselis, Toni Veikkolainen, Veikko Mäkelä, Hannu Määttänen, Porin Karhunvartijat

246P / (NEAT) The periodic comet of the Jupiter family was filmed on the second night of the March work. The comet was discovered in the Near Earth Asteroid Tracking (NEAT) search program on January 14, 2004, at Haleakala Observatory. The comet is on the orbit of the Hilda group and forms a 2: 3 orbital resonance with Jupiter. When photographing the comet was 2,445au away, the nearest 2,384au on April 9, 2020. 1Picture. stacked Average by comet. Tail noticeable approx.50 "and comma 16". 2Picture. stacked Summit by the stars. The movement is poorly visible. Asteroid (175974) 2000 NC13 20.41mag,...

Images: 4 pcs

Telescopic comet Wirtanen

6.4.2019 at 23.19 - 23.38 - Orimattila, Artjärvi, Tähtikallio (II)
Kari Laihia, Dennis Lehtonen, Olli-Pekka Joronen, Christos Oscar Kambiselis, Veikko Mäkelä, Hannu Määttänen, Porin Karhunvartijat

The 46P / Wirtanen comet was filmed on the second night of the April 2019 Equipment Days. The comet of the Jupiter family was discovered by the American astronomer Carl Wirtanen at the Lick Observatory on January 15, 1948. We last photographed the asteroid in January at https://www.taivaanvahti.fi/observations/show/80890 . The comet is already much dimmed to its maximum, filming it was 1.0au away. 1Picture. Average stack by comet, small coma asymmetric. 2Picture. the sum image of the stack stacked according to the stars, the motion is reflected as the stretching of the stars. 3Picture. first i...

Images: 4 pcs

Telescopic comet Wirtanen

28.2.2019 at 22.33 - 23.06 - Valtimo (II)
Veli-Pekka Häkkinen

Second comet from Wirta.

Binocular comet Wirtanen

27.1.2019 at 19.46 - 20.15 - Hankasalmi, Murtoinen (III)
Harri Kiiskinen, Jyväskylän Sirius

Yes, this Wirtanen is still spectacular when you can shoot with a decent tute.

Binocular comet Wirtanen

24.1.2019 at 22.30 - Fregenal de la Sierra, Espanja (III)
Tapio Lahtinen, Tampereen Ursa

Perhaps the last observations for my part about this comet.

Telescopic comet Wirtanen

23.1.2019 at 19.00 - Kuusamo
Voitto Pitkänen, Ursa (Pohjois-Suomi)

The comet continues to leave in the direction of the constellation of the Big Bear. The glow of the moon began to interfere with observation.

Images: 2 pcs

Telescopic comet Wirtanen

13.1.2019 at 00.12 - Kuusamo
Voitto Pitkänen, Ursa (Pohjois-Suomi)

This observation seems to remain the last part of this comet, so let’s put it another way. Wirtta was observed and described many times. Quite a nice 'bright spot' to color the winter gray observation coils.

Binocular comet Wirtanen

12.1.2019 at 22.15 - Orimattila, Artjärvi, Tähtikallio (III)
Veikko Mäkelä, Ursa (Helsinki)

Tähtikallio's helpers try to make a visual observation of Wirtase, when in urban conditions they were able to see it first due to light pollution and cloudy weather. With the 18x50 binoculars with the stabilizer, the comet was easier. It was not only in an easy location near the Muschida star at the "end" of the Big Bear, but also high in the sky. When the subject happened in the field of view, it stood out easily. Brightness: 7.3 mag (out-out method) DC: 3 Comma: 12 ' The findings are pretty much in line with those made in the world, except the coma was a bit smaller. It should have b...

Telescopic comet Wirtanen

12.1.2019 at 21.45 - Naantali, Rymättylä (I)
Lasse Nurminen

A couple of single frames without tracking became exposed in the assumed Wirtanen direction. As a cinema manager, there were 75 moths and I could hardly find the Big Bear under Muscida in that picture. Images cropped to a fairly original size.

Images: 2 pcs

Binocular comet Wirtanen

12.1.2019 at 21.02 - 21.34 - Orimattila, Artjärvi, Tähtikallio (IV)
Kari Laihia, Dennis Lehtonen, Olli-Pekka Joronen, Christos Oscar Kambiselis, Veikko Mäkelä, Hannu Määttänen, Porin Karhunvartijat

46P / Wirtanen NEO / Comet was filmed on the second night of the January 2019 campaign. American astronomer Carl Alvar Wirtanen discovered the comet of the Jupiter family at the Lick Observatory on January 17, 1948. Wirtanen, who has a Finnish background, became interested in astronomy at the age of 12 and built a mirror telescope while still an amateur astronomer, Wikipedia https://en.wikipedia.org/wiki/Ciki Carl Wirtanen has found 8 asteroids in addition to the comet in his name. He did his life’s work at the Lick Observatory at the University of California, Santa Cruz. The observatory is on...

Images: 4 pcs

Telescopic comet Wirtanen

12.1.2019 at 19.26 - Taipalsaari, Jauhiala (II)
Heikki Pyysalo

I finally found out and got Wirtanen photographed. The picture is not oo wedding, but the time in the middle hit after a small search.

Binocular comet Wirtanen

12.1.2019 at 01.00 - 03.30 - Inkoo (III)
Sami Multasuo

For a long time, the weather favored shooting and I finally got to shoot 46P / Wirtanen. The subject is in a slightly challenging location in the sense that shooting is done almost straight up.

Binocular comet Wirtanen

12.1.2019 at 00.18 - Mustasaari (II)
Tommi Järvilehto, Vaasan Andromeda

Finally the first chance to spot Wirta after bad weather and a long flu. Many alignment images were allowed to be taken before I got a comet in the middle of the cell. about 30kp :). There were no very bright stars nearby. Camera in an awkward almost vertical installation. Unfortunately, all the 30s 30s exposures in the main series went to ruin. In Sony's Timelapse api, autofocus was turned on as an exception to the camera's own settings. Autofocus did not work certain properly on a dim subject. There were big balls in the picture. One image was successful. Picture before starting the ...

Comments: 1 pcs

Binocular comet Wirtanen

11.1.2019 at 23.20 - 00.57 - Helsinki (IV)
Tero Hiekkalinna, Ursa (Helsinki)

I finally got the 46P / Wirtanen comet described. The tail may be slightly visible at 1 to 2 p.m. Exposure for a total of 1 hour and 12 minutes.

Images: 3 pcs

Telescopic comet Wirtanen

11.1.2019 at 23.15 - Helsinki (II)
Juha Parvio, Ursa (Etelä-Suomi)

After filming Orion, I quickly wanted to try to see if Comet Wirtanen could still be photographed. That's when it was conveniently next to the Big Bear's muscida star (o UMa) and had already risen close to the zenith. And the comet appeared in the pictures, although it is already clearly dimmed. I then filmed Wirtase for half an hour.

Binocular comet Wirtanen

11.1.2019 at 17.50 - 05.00 - Helsinki, Maunula (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

46P/Wirtanen is still actively emitting CN cyanogen radical gas jets and it's distance from Earth is about 0,18AU. Here in first image Wirtanen is exposed 3 hours at near UV 387nm narrowband wavelength, where about 30' diameter coma is visible. In the second image Wirtanen is exposed with R filter, where short dust tail of length 3' toward PA 210° is visible. I made also almost all night long exposures with CN 387nm cyanogen filter, totalling of more than 10 hours of 5 minute exposures during 11 hour of observing time. Few clouds was passing over during evening and meridian flip must also be d...

Images: 3 pcs • Comments: 2 pcs

Telescopic comet Wirtanen

9.1.2019 at 22.00 - Kuusamo
Voitto Pitkänen, Ursa (Pohjois-Suomi)

The comet shone faintly among the ice mist.

Images: 2 pcs

Binocular comet Wirtanen

3.1.2019 at 20.30 - 21.30 - Inkoo (II)
Jouko Markkanen, Ursa (Helsinki)

Wirtanen fades, no longer distinguished with the naked eye, but the binoculars were still found when he knew where to look.

Binocular comet Wirtanen

3.1.2019 at 18.20 - 18.35 - Mäntsälä, Ohkola (III)
Teppo Laitinen, Keski-Uudenmaan Altair

Had to go to test what kind of picture this would get. There was enough of the frost that I didn't tune in to bigger equipment, but with camera optics I quickly went to the nearby field. If you use your imagination, then at four o'clock you could see a tail-like.

Binocular comet Wirtanen

3.1.2019 at 18.02 - Kangaslampi (V)
Esa Heikkinen, Anni Heikkinen, Veli-Pekka Hentunen, Warkauden Kassiopeia

Outgoing Wirtanen photographed with a CCD and digital wit. In the second CCD image, the stretch of the image is knocked out as much as possible so that the entire comet material becomes widely visible. Wirtanen fills almost the entire field of view, thus being at least 20 arc minutes in size and perhaps slightly egg-shaped, so the tail could be right downward. CCD images are 18 'x 23' in size. Illustrated by Anni and Esa Heikkinen, processing of CCD images Veli-Pekka Hentunen.

Images: 3 pcs

Search result contains observations from time period 1.10.2018 klo 00.00 - 09.08.2022 klo 20.09.