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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.

A fireball at night, brigter than the venus

5.9.2021 at 01.03 - Littoinen (III)
Esa Eronen, Turun Ursa

Fireball and smoke. Flame late Perseid. Based on the images, the smoke was visible in about ten images, or five minutes. No visual observation. I’ve been hunting for meteors with a Gopro camera that has a fairly wide field of view and can be safely left out unattended for the night. The camera does not fog or rain.

Images: 2 pcs

A fireball in a twilight sky

7.8.2020 at 23.40 - Taivassalo (IV)
Esa Eronen, Turun Ursa

I didn’t get a visual observation, but GoPro was watching the sky on a rock in a rock hole. The image sequence consists of 116 images: 3 images per minute, exposure times at the beginning of 2s and at the end of 8s. When the subject is displayed in the image, the shutter speeds are about 2 s. Based on the series of images, the object that left the smokehouse was in the image field for about 70 seconds, after which the van disappeared from the image after about 40 minutes. When it appears in the image field, the item appears in two parts. Next, it appears to break down into three parts, one of ...

Images: 2 pcs • Comments: 8 pcs

Binocular comet NEOWISE

17.7.2020 at 01.32 - 02.00 - Parainen (II)
Esa Eronen, Turun Ursa

Exceptionally beautiful and calm night, here and there you can see slight night clouds but do not interfere with the observation. Easily found with 16x80 binoculars but the subject does not hurt the naked eye in any way. The comma clearly shows the mean brightness DC 4. The coma, brightness and tail are clearly hazy compared to the star.

Binocular comet NEOWISE

12.7.2020 at 00.50 - 01.15 - Parainen (III)
Esa Eronen, Turun Ursa

I searched for the comet for a moment with 16x80 binoculars and soon it was found in the place described by previous observations. With the 16x80 binoculars, the coma and the tail of the tail stood out clearly and actually the view was handsome. 8x42 with binoculars a bit more modest but easily found. The subject was wrapped in night clouds as in a few previous nights so the observation was even more aesthetic in nature. All in all, a great summer night.

Images: 2 pcs

Bright night shining clouds

9.7.2020 at 22.35 - 05.18 - Lieto (IV)
Esa Eronen, Turun Ursa

Illuminating night clouds photographed in Lieto as a time child (image / minute). The video shows well the appearance, movement and disappearance of the clouds before sunrise.

Comments: 4 pcs

Bright night shining clouds

7.7.2020 at 23.00 - 04.23 - Lieto (IV)
Esa Eronen, Turun Ursa

Illuminating night clouds photographed in Lieto as a time child Gopro experiment (picture / minute). The flame before sunrise shows a few rays of oxen sweeping among the night clouds.

Telescopic comet ATLAS

25.4.2020 at 01.51 - 02.26 - Paimio (II)
Esa Eronen, Mika Aarnio, Turun Ursa

Once again C / 2019 Y4 (ATLAS) Animation: L-filter 7x60s / frame or 7min / frame Somehow now, but in the darkest moments of the night, you should start remembering that the beak of the comet should not be placed in the middle of the image, but a little aside, so that there is more space for the tail to pose. The finest tones of the tail easily disappear due to the unevenness of the image field.

Images: 2 pcs • Comments: 3 pcs

Binocular comet ATLAS

25.4.2020 at 00.00 - 00.45 - Paimio (III)
Esa Eronen, Mika Aarnio, Turun Ursa

In the animation, the individual frames are a moving average of five images, in which, the size of the tail comes out a little better. The tail may be longer than that 17 '. Brightness estimation is difficult. Of the square image (0.5 degrees to its square), where the brightest stars are about 7 and 8 m, the brightness can be estimated at perhaps 8. Up is -179 degrees E of N

Images: 4 pcs

Telescopic comet PANSTARRS

22.4.2020 at 01.29 - 02.23 - Paimio (III)
Esa Eronen, Mika Aarnio, Turun Ursa

The coma shows a clear central condensation, DC 6. The tail is at an angle of almost 90 degrees to the direction of movement. The brightness distribution of the coma looks asymmetrical, and the flame just that brightest angle is in the direction of the Sun. Images with L-filter 30x60s

Images: 3 pcs

Telescopic comet ATLAS

18.4.2020 at 00.25 - 01.38 - Paimio (III)
Mika Aarnio, Esa Eronen, Turun Ursa

Photos: Mika Aarnio Due to the coronavirus, club nights were banned from the Iso-Heikkilä observatory, so I went to Kevola to shoot. It’s nice to shoot with well-functioning hardware, I set the shooting program to 60 1-minute exposures. I can give a link to the raw images if someone wants to dig up more information from the images or practice image processing. Image processing: Esa Eronen In the animation, the individual frems consist of the average of nine consecutive images, making the fragmented structure of the comet better visible.

Images: 2 pcs

Telescopic comet ATLAS

9.4.2020 at 22.43 - 23.28 - Kaarina (II)
Esa Eronen, Turun Ursa

The brightness of the sky changed throughout the observation because the Moon 95% has just risen. It looks as if the coma no longer shows a clear center brightness, so DC 2. The coma looks stretched compared to before, which may be the result of a change or too long a shutter speed of 4min / frame. PA 90 degrees.

Images: 3 pcs • Comments: 1 pcs

Binocular comet ATLAS

3.4.2020 at 22.05 - 22.31 - Kaarina (III)
Esa Eronen, Turun Ursa

In the corona quarantine from the backyard, photographed in the glow of the moon and street lights.

Images: 4 pcs

Binocular comet ATLAS

30.3.2020 at 22.57 - 00.00 - Kaarina (II)
Esa Eronen, Turun Ursa

Quite a distinctive coma based on the image, maybe 2 ', DC 6. Local light pollution probably affects the observation.

Images: 2 pcs • Comments: 2 pcs

A fireball in a twilight sky

31.8.2019 at 22.25 - Taivassalo (IV)
Esa Eronen, Turun Ursa

I prepared the camera to take pictures of the Milky Way, and at some point while trying and adjusting the settings, this bright meteor happened to be in the picture. No visual observation other than afterwards from the camera screen.

Images: 2 pcs • Comments: 2 pcs

Binocular comet Giacobini-Zinner

30.8.2018 at 01.57 - 02.55 - Paimio (III)
Esa Eronen, Turun Ursa

The idea was to recall the use of the Kevola tube and the imaging system. 21P was really good for this purpose. Ko. with a system exposure of about 1 minute, the comet seemed to remain still "motionless," so the actual exposure then 50x60s. I also tried to see if the comet would show with a 7x50 binoculars, but I didn’t really see it. The sky was too bright. PA = 268 degrees.

Images: 3 pcs

Binocular comet Giacobini-Zinner

21.8.2018 at 02.30 - 02.50 - Kaarina (III)
Esa Eronen, Turun Ursa

Since this is a binocular comet, I tried to detect it with a few different sized binoculars and find out how well it is visible in Kaarina’s lights. Seen from the arm, an easy case with 16x80 binoculars. The coma is visible and you can even get an idea of the direction of the tail. The standard 7x50 binoculars no longer have such a clear case, but it is clearly different from a star-shaped object and looks hazy to the side eye. With the small binoculars 8x32 you can imagine seeing something as long as you have first found it with the bigger binoculars. By the time of observation, the darkest m...

Telescopic comet PANSTARRS

3.4.2018 at 23.49 - 00.40 - Paimio, Kevola (III)
Esa Eronen, Turun Ursa

The real purpose of the evening was to describe the flats, but then I had to try this one too. The coma would look asymmetrical, brightening in the direction of travel. Condensation maybe 7.

Images: 2 pcs

Telescopic comet PANSTARRS

3.4.2018 at 22.16 - 23.04 - Paimio, Kevola (IV)
Esa Eronen, Turun Ursa

I was able to describe all the color channels, but then the typing technique ended, so in the pictures now only L. DC 5.

Images: 2 pcs

Telescopic comet PANSTARRS

20.3.2018 at 22.29 - 23.04 - Kevola, Paimio (II)
Esa Eronen, Turun Ursa

Once again, I tried a comet with a 17-inch to see if the tail would come out better. The bright front end is more visible, but the dimmer tail end, perhaps 15 minutes long, fades quickly to the invisible compared to the tail shot a few days earlier with a Canon 300mm lens (perhaps 40 minutes). Hardly the tail has shrunk in a couple of days but the reason is something else. This time I got the images calibrated, but during focusing and other adjustments, the comet had time to wander to the edge of the image field. At the time of shooting, the comet was already far west and basking in the lights...

Images: 2 pcs • Comments: 3 pcs

Telescopic comet PANSTARRS

17.3.2018 at 21.39 - 21.55 - Paimio, Kevola (II)
Esa Eronen, Turun Ursa

Spring is already far away and when it gets dark the destination has moved far west. Seen from Kevola in the direction of Turku and Paimio, where the sky glows red. The picture shows the comet bluish on the left and the California mist of Perseus on the right.

Search result contains observations from time period 1.1.2000 klo 00.00 - 8.12.2021 klo 9.29.