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

Ursa Astronomical Association

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

Binocular comet ZTF

26.1.2023 at 22.30 - 05.50 - Pieksämäki (IV)
Timo Kantola, Ursa (Itä-Suomi)

Nice comet! From the beginning of the evening I watched with 7x50 binoculars. The comet was easy to find and was visible as a clear oblong haze, although Pieksämäki's LED lighting annoyingly disturbs my observation spot in the northern sky. Next, I applied for a more robust Celestron 76mm f300mm Cometron, which is just the right game for this kind of comet bongaing. With that, the shape of the comet began to take shape, I couldn't make out the tail any worse. At the beginning of the evening at 22:30 I took a few pictures with the modded Canon 1000D + 135mmF2. Either due to light pollut...

Images: 6 pcs • Comments: 1 pcs

Telescopic comet ZTF

26.1.2023 at 19.27 - 20.21 - Paimio (II)
Mika Aarnio, Turun Ursa

Observation is easy these days. The stand followed the comet and the camera shot 10 times for 5 min, I sat in the warmth and looked at the picture;).

Comet with naked eye coma ZTF

30.1.2023 at 04.13 - 04.35 - Fregenal de la Sierra, Espanja (I)
Tapio Lahtinen, Tampereen Ursa

The intention was to film a longer 3-hour session following the comet, but the Meridian flip failed for some reason and photons were only collected for less than half an hour. Secondly, since some people also photograph galaxies with narrowband filters, I decided that why not comets as well. Well, the result is not very surprising. Edit: added a small animation

Images: 5 pcs

Binocular comet ZTF

26.1.2023 at 22.58 - 23.22 - Kouvola (I)
Tero Sipinen, Ursa (Etelä-Suomi)

Well, I had to immortalize this "smart-ass comet" too. I took a picture in the lights of the city center first with a 24-millimeter, and after zooming in for a while, I found a patch of greenish haze. I couldn't distinguish the comet with my naked eyes, although I got a pretty good direction with the help of the picture and the treetops. Finally, I took 20 images with 120 mil for stacking. I didn't start practicing other programs, but with the familiar and safe Halostack, this job was also successful. The first image is an average stack of 19 images aimed at the comet, still cropped fr...

Images: 3 pcs

Comet with naked eye coma ZTF

29.1.2023 at 02.30 - 06.06 - Uurainen (III)
Aleksi Ruotsila, Jyväskylän Sirius

Sacrificing a reasonable sleep pattern and a night's sleep, I left early in the morning to photograph this comet when I had the chance (weekend, moon setting, a suitable opening in the clouds). The comet's tail was a fairly steadily moving jet during this viewing interval, while a couple of days ago when I was photographing it there was much more life. Undeniably an interesting and dynamic object to photograph. For the comet, almost 3 hours of exposure, and for the stars I used the same photos from just an hour ago.

Binocular comet ZTF

27.1.2023 at 20.30 - Nurmijärvi (I)
Emma Bruus, Ursa (Etelä-Suomi)

These conditions of observation would not be remembered at the evening campfire of Cygnus. And the poets wouldn't come right now to compose ethereal ballads about 'the magic night when the stars shone brightly'. A certificate of honor would not be awarded for blustery weather. And no medals for Klaukkala's light pollution conditions. A mass of clouds rolled in from the southeast, like an alligator from the deepest hole in a suburban sewer in Vantaa. But it didn't help to complain, this was the best weather for a month. Maybe even for two months. There were no guarantees abo...

Images: 2 pcs

Binocular comet ZTF

26.1.2023 at 19.20 - 22.50 - Outokumpu (III)
Antti Taskinen, Joensuun Seulaset

I also went to observe comet ZTF. With 15x50 binoculars it was easy to find and appeared as a featureless nebula of the same type as the Andromeda galaxy. With my naked eyes, I couldn't distinguish it from the light-polluted and moonlit sky. In addition, when there were clouds drifting in the sky and the transparency was otherwise poor, the conditions for photographing the comet were far from ideal. However, the comet's tails were recorded in the pictures somehow. Attached are the first two images compiled from shots at 22:37-22:50 (total exposure time 12 min) and the third from shots ...

Images: 4 pcs

Moon

27.1.2023 at 18.14 - 18.18 - Janakkala, Tervakoski (III)
Petri Kuossari, Riihimäen tähtit. yhdistys

Friday evening there was a moment of clear sky, while thinking about the evening's destinations I put both tubes Vespera and eVscope to photograph the moon. First picture Vespera and second picture eVscope. The first quarter of the month was 40% I still had time to take a couple of four-minute exposures of comet C/2022 E3 and, surprise, the clouds arrived, the shooting night ended short. Fortunately, the weather on Friday morning and night was great, I got perhaps my best shots of the comet https://www.taivaanvahti.fi/observations/show/111644

Images: 2 pcs

Binocular comet ZTF

29.1.2023 at 02.00 - 02.20 - Tampere (II)
Kalle Helenius

As a continuation of the statistics, Test samples also from Tampere. The pile revealed a little something like a detail, but otherwise the fresh white snow cover in cooperation with the lamps and the moon blocked the view - even before the clouds arrived.

Images: 2 pcs

Comet with naked eye coma ZTF

28.1.2023 at 22.45 - 23.00 - Nokia (I)
Tapio Lahtinen, Tampereen Ursa

I got a tip about the observation site in the direction of Nokia and went to check the place. It was reasonably good in terms of light pollution - although the Northeast is naturally the worst because of Tampere. I had a really light and comfortable person's equipment with me. I controlled the tripod wirelessly with my laptop and the paperback also wirelessly with my mobile phone and from the comfort of a warm car :) Edit: 4th picture is a grainy cell phone picture looking north

Images: 4 pcs

Comet with naked eye coma ZTF

27.1.2023 at 22.27 - 22.47 - Fregenal de la Sierra, Espanja (I)
Tapio Lahtinen, Tampereen Ursa

Following the comet, I tried to get a better view of the tail with longer exposures. It is really challenging to take a mosaic of even two pieces from a fast-moving comet. And there was no other choice but to destroy the stars.

Binocular comet ZTF

27.1.2023 at 21.00 - 22.00 - Askola (IV)
Ville Wiik

A quick test to capture C/2022 E3 with an old 300mm Nikkor. The tail also stands out a little from there :)

Images: 3 pcs

Binocular comet ZTF

29.1.2023 at 01.34 - Helsinki (I)
Pentti Arpalahti

The conditions were not ideal, but the Weather Report promised that it would clear up a bit for a couple of hours. The moment was right, because a raft of clouds from the northwest covered the sky around two o'clock. Otava and Pohjantähti (mag. approx. 2) somehow stood out, so I pointed the camera almost to the zenith half-blindly between Otava and Pohjantähti. Two frames were hit well enough by the comet and I combined them to improve the noise. After all, stars up to magnitude 9 stood out with the camera. Judging from the top 7-star group as a reference, the brightness of the comet is ab...

Binocular comet ztf

28.1.2023 at 00.45 - 01.20 - Helsinki (III)
Pertti Ankkuri, Ursa (Helsinki)

Well, that comet was found in the sky of Helsinki when you looked really hard. Light pollution and hazy air added enough challenges. The picture was taken with a basic system camera and (18-400mm) 400mm lens, aperture f/6.3, ISO 4000, 15s exposure. The image has been edited with Rawtherapee 5.9 to make the comet stand out better. The video clip has 74 images that have been assembled in Openshot v.3.0. The subtle movement of the subject compared to the stars in the background stands out.

Images: 2 pcs

Comet with naked eye coma ZTF

29.1.2023 at 00.39 - 00.55 - Kangasala, Sahalahti (II)
Jorma Mäntylä

Comet ZTF was found again in little Otava. The pictures did not turn out as good as on 26.1. Seeing was not as good and the moonlight has already started to disturb. Still a handsome tail. The movement during 10 min is distinguished from the two images 0.36 and 0.46. Let's follow up. Edit. I processed the images with Deep Sky Stacker. The image now contains 6x30 s RAW images. The comet moved so slowly that the stacking was successful.

Images: 3 pcs

Binocular comet

28.1.2023 at 23.30 - 00.00 - Karstula (III)
Jussi Halttunen, Jyväskylän Sirius

Comet ZTF was visible bright in the northern sky in the constellation Ursa Minor near the star Kochab. Shot with a 15 second exposure through a 16" mirror telescope. Canon EOS 6D.

Binocular comet ZTF

28.1.2023 at 19.05 - Kurikka (II)
Marko Myllyniemi, Lakeuden Ursa

The filming of Comet C/2022 E3 ZTF was hectic today, because I only had time to take three 20s exposures, when the clouds rolled in and there was no way to continue filming. Well, that's better than nothing.

Comet with naked eye coma ZTF

27.1.2023 at 00.00 - 04.00 - Äänekoski (III)
Aleksi Ruotsila, Jyväskylän Sirius

I drove to the slightly more remote Bortle 3 location to photograph this comet. The cloud rafts teased for a long time, but in the end the entire morning was clear. The comet's head of the eyes stood out only with difficulty after a long time of getting used to it. Image size of the larger image: 7 degrees 55 min x 4 degrees 57 min. In the video, the flickering of the comet's tail near the comet is due to the processing of the images.

Images: 3 pcs

Binocular comet ZTF

20.1.2023 at 19.09 - 20.14 - Janakkala, Tervakoski (III)
Petri Kuossari, Riihimäen tähtit. yhdistys

Comet C/2022 E3 update January 20-26 Our light curve shows a steady increase in brightness, dimmer than some sources like COBS, but brighter than, say, JPL Horizons. Measuring the full flux of a large comet in a detector is challenging.

Images: 2 pcs

Binocular comet ZTF

27.1.2023 at 02.35 - 04.25 - Mänttä-Vilppula (IV)
Jukka Laakso

In the end, it was moderately clear here as well for photographing the comet. Even with binoculars, the thud stood out. A good 100 minutes of exposures from the front (minus cloud fines) were accumulated with the 135-millimeter. Sum and median stack images and a star-locked median stack with the Little Bear's Pherkad and Pherkad minor vas. in the upper corner.

Images: 3 pcs • Comments: 3 pcs

Search result contains observations from time period 13.3.2022 klo 00.01 - 31.1.2023 klo 23.59.