Contact information

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

Ursa Astronomical Association

4 observations and 0 comments in queue.

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

Half-sky auroras

3.4.2016 at 01.15 - Lumijoki (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

Northern lights were visible from the full sky in the Snow River a little south of Oulu. We had been in Lapland the previous week where only the dim northern lights had been seen, but now the decent northern lights came in a suitable "half-length" towards Southern Finland. The tight "comb pattern" of the northern lights added in the second picture was an interesting phenomenon that lasted for several minutes.

Images: 4 pcs

Partial solar eclipse

20.3.2015 at 12.08 - 12.08 - Äkäslompolo, Ylläs (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

As the eclipse progressed, the shadows sharpened, the environment became blurred and the icy northern wind in Yllästunturi's Varkaankuru seemed to rise. Sunglasses were not needed at the peak times with the whitish hangers of the fells. A blackout series was filmed every 3min from 11:54 to 12:57.

Images: 3 pcs

Total lunar eclipse

28.7.2018 at 00.16 - Pyhäntä, Tavastkenkä (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

The summer night in Northern Ostrobothnia is still very bright and finding a completely darkened moon was difficult at first. With my naked eyes I suddenly snapped from the shallow of the moon over the fields at 11:50 p.m. The attached cell phone picture was taken at 12:16 a.m., when the left edge of the moon had just begun to brighten. This lunar eclipse "diamond ring" phenomenon was a great sight to the naked eye.

Starscape image

30.8.2013 at 23.50 - Hirvensalmi (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

The Milky Way photographed in Pehesaari, Hirvensalmi, Puula. The picture nicely shows our nearest corner, our home galaxy, and at the top of the picture, the neighboring galaxy M31.

Variable star TCP J05074264+2447555

6.11.2017 at 23.40 - Helsinki, Maunula (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

Encouraged by the brightness observations of Arto’s gravitational lens TCP J05074264 + 2447555, here is my first photometry observation, especially when I noticed that the brightness value obtained from this Photodiff is not terribly wrong. 15x10 second images averaged mag 12.50, filter not official Johnson V.

Images: 2 pcs

Variable star MAXI J1820+070

15.4.2018 at 03.42 - 04.44 - Helsinki, Maunula (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

I tried to highlight the MAXI J1820 + 070 light curve of the black hole in the lightening spring work, from Arto's tip. I photographed the subject in UV narrowband 387nm / 15nm, 30 exposures for 2 minutes, ie for just over an hour until the sky was too light. The hourly light curve became quite clear with a 0.20mag dimming. The absolute magnitudes are indicative because the reference stars of that particular 387nm wavelength were not known and I used the stars of region B TYC 444-2474-1 B12.25 and TYC 444-2630-1 B11.51 as some kind of calibration and BD + 07 3641 B11.10 as a reference. The...

Images: 5 pcs

Faint naked-eye comet PANSTARRS

16.3.2013 at 19.49 - Helsinki (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

An evening walk at Maunula's house with binoculars and a camera included. The comet was easily found with binoculars and was visible to the naked eye around 19:50 as an approximately oval nebula similar to the Andromeda galaxy M31. In the big picture, the background is the Hämeenlinna motorway. In the second image, the star right next to the comet's core is SAO 91975 mag 8.18. Farther in the direction of the tail is SAO 92001 mag 7.04, distance from the core 45 '.

Images: 2 pcs

Transit of venus

8.6.2004 at 08.38 - Pyhäntä, Tavastkenkä (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

Excerpts from the archive: Kai Forssen, Ari Mäkelä and Jorma Ryske from the Cosmological Society of Southern Finland noticed the passage of Venus on June 8, 2004 in Tavernkeng, Pyhännän, Northern Ostrobothnia. In the morning, when the overpass began, the sky was completely cloudless. Later in the morning the clouds increased and a few raindrops and hail dropped from the sky. The end of the overpass was viewed from the cracks of the clouds. In addition, a couple of overviews of the play organized by the Cosmological Society of Southern Finland in the village of Tavastkengä on the Anttom farm. H...

Images: 5 pcs

Faint naked-eye comet NEOWISE

10.7.2020 at 01.00 - 02.00 - Helsinki, Haltiala (IV)
Jorma Ryske, Etelä-Suomen kosmol. seura

C / 2020 F3 (Neowise) had to be spotted even though it was hiding in the very bright northern sky in early July. The fields of Haltiala in northern Helsinki have a good view to the north almost to the horizon, so in the morning to test whether there is a comet. At first, Capella was also hidden behind the illuminating night clouds, but when it was found, the directions were roughly known and a comet was found with 10x42 binoculars in a moment. As the shadows of the illuminating night clouds shifted so that the comet remained between them in a suitably cloudless place "placemarked", it quite ea...

Images: 3 pcs • Comments: 1 pcs

Clearly visible night shining clouds

28.7.2017 at 01.50 - 02.06 - Pyhäntä, Tavastkenkä (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

Illuminating night clouds moved in the morning northeastern sky of Northern Ostrobothnia on 28 July 2017. An animation of 100 images shot from 1:50 to 2:06 in the morning, at dawn, with still images taken every 10 seconds.

Variable star GSC 3004-0870

11.3.2017 at 17.57 - 19.57 - Orimattila, Artjärvi, Tähtikallio (III)
Ville Puoskari, Kari Laihia, Jorma Ryske, Timo Kantola, Tapio Lahtinen, Veikko Mäkelä, Kuopion Saturnus

Delta Scuti star observed as a training object in the Photometry workshop. Alluna's Shooting Team: Kari Laihia, Veikko Mäkelä, Janne Voutilainen, Jorma Ryske, Tapio Lahtinen, Timo Kantola and the undersigned.

Variable star V416 UMa

11.3.2017 at 22.29 - 00.29 - Orimattila, Artjärvi, Tähtikallio (III)
Ville Puoskari, Kari Laihia, Jorma Ryske, Timo Kantola, Tapio Lahtinen, Veikko Mäkelä, Kuopion Saturnus

Another training object during the Tähtikallio photometry workshop. Alluna's Shooting Team: Kari Laihia, Veikko Mäkelä, Jorma Ryske, Timo Kantola, Janne Voutilainen, Tapio Lahtinen and the undersigned.

Comments: 6 pcs

Supernova SN2018zd

29.3.2018 at 22.00 - Helsinki, Maunula (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

SN2018zd in the galaxy NGC2146, bongaama of Rauno. A total of 15 minutes of exposure. L of the single image taken with the filter measured for the supernova mag 13.92 with FotoDif, which happened to be exactly the same as the magnitude of the reference star GSC0452900535. Added blinking animation of visible light image and narrowband NUV range 387nm / 15nm image. Blinking shows interesting variations in the brightness of the supernova, different stars, and the galaxy NGC2146 itself. SN2018zd discharges hot, clearly visible on UV, its brightness is already approaching the brightness of the core...

Images: 2 pcs

Supernova SN2018zd

3.4.2018 at 22.07 - Helsinki, Maunula (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

SN2018zd in the galaxy NGC2146, with L filter with 10 minute exposure and here a heavily cropped version. From the images taken with the L filter measured using Photodiff for supernova mag 13.94, GSC0452900535 PV mag 13.92 was used as reference star. NUV / Near ultraviolet 387nm narrowband 15nm image with a slower 50min total exposure. A blinking animation of the visible light image and the 387nm / 15nm image of the NUV area, in which the brightness of several subjects varies, this time also made the NUV image focused.

Images: 2 pcs

M87 Black Hole Jet

22.3.2020 at 02.00 - 03.10 - Helsinki, Maunula (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

I wondered if the narrow-band UV filter M87 would somehow make the famous relativistic shower of the black hole more clearly visible. However, it doesn’t stand out strikingly here compared to RGB exposures, but maybe a little “hot blue-white” on the jet is visible. In the attached RGB image, the UV exposures are placed in the B band. This item requires a longer focal length, 1200mm is too little. RGB exposures 10min and UV 387nm 40min. Added dotted image of a narrowband 387nm UV filter exposure alone.

Images: 2 pcs • Comments: 4 pcs

Binocular comet LINEAR

29.12.2012 at 02.37 - Helsinki (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

C / 2012 K5 photographed in Maunula, Helsinki, in the light of the full moon. This comet moves nimbly as shown in the image from the streaks of stars, during 6 minutes of exposure for almost 2 minutes of arc. Measured from the figure, coma 2 ', tail 10' in the direction PA 210 °. The brightest star on the left side of the image is SAO26494, mag8.69. The image field is 26'x20 ', the north is at the top, the east is on the left.

Images: 2 pcs • Comments: 2 pcs

Binocular comet PANSTARRS

13.3.2013 at 19.33 - Helsinki (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

PanSTARSS observed at the Maunula ski lodge in Helsinki. The comet was found with binoculars between 10x42 Skywardens at 19:15 and when the sky was a little dark it was also visible to the naked eye around 19:30. Photos at 19:37 and 19:33, in the background The Hague. Just below the moon at n 5 o'clock, the star is mag 4.4 SAO 109474.

Images: 2 pcs

Binocular comet Lovejoy

6.1.2015 at 19.30 - Helsinki (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

Lovejoy go to cool in the low southern sky. With binoculars, an 8x42 comet was found as a fog ball when you knew where to look. When shooting with a small lens tube, the one-time exposures were maximum, otherwise the comet went streaked. Still, the rising full moon and light pollution in Helsinki grayed out the picture. Attached is 8x1min exposure with restraint and to reveal a dim tail when treated more aggressively. North is in the pictures at the top, east on the left, the area of the image field is 55 'x 35'. The brightest star on the left side of the image is HIP20628 mag 7.46.

Images: 2 pcs • Comments: 3 pcs

Telescopic comet Catalina

12.3.2016 at 22.00 - Orimattila, Artjärvi, Viestikallio (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

Catalina photographed in connection with the Solar System meeting in Artjärvi Tähtikallio's "upstairs neighbor" at Viestikallio. The first is an animation of five images, the second the same five images stacked according to the head of the comet, and the third image is a single exposure.

Images: 3 pcs

Transit of mercury

7.5.2003 at 08.30 - Helsinki, Maunula (III)
Jorma Ryske, Etelä-Suomen kosmol. seura

Extracted from the archive: Notes on this Mercury overrun were non-existent and the observation had remained in the "desk box" due to its poor quality. This is photographed with a pocket camera by hand with an eyepiece projection, even the time is for reference only.

Search result contains observations from time period 1.1.2000 klo 00.00 - 3.7.2022 klo 15.52.