Skywarden

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

Ursa Astronomical Association

Good crepuscular rays Friday night

26.6. A surprisingly large number of observations of twilight rays was reported to Skywarden on the Friday night. The slightly less frequently reported component of the phenomenon opposite the sun is called the anticrepuscular rays. Mikko Luoto got a great picture of them on Friday at 23:40 pm from a ski resort tower in Vaasa.

June crepucular rays »

A notch better case of reflected cloud rays

21.6. On the night between Monday and Tuesday, Kuusamo's summer night painted the underside of the cloud deck with splendid reflected cloud rays, that rank easily among the top examples of the phenomon in Taivaanvahti. The photo was taken by Jani Päiväniemi in Juuma. Cloud rays are alternations of light and shadow, the rarer reflected type arising from light whose immediate source is reflection from water surface.

Päiväniemi's observation »

Sun in three ways

20.6. "Our near-star with three different wavelengths, which is dubbed the 'trifecta' among sun enthusiasts," says Petrus Kurppa of his photo. Calcium II K on the left, in the middle full spectrum of visible light, on the right Hydrogen alpha. The wavelength of hydrogen alpha 656 nm is in the deep red part of the spectrum, while the wavelength of calcium II K 393 nm is close to ultraviolet.

Kurppa's observation »

The first night thunderstorms captured

19.6. On the night between Saturday and Sunday, the first night thunderstorms of the season roarred over southern Finland. A couple of observers had set off with their cameras, Petri Mäkinen's picture show lightning in Masku immediately after midnight. "It was great to watch" says Mäkinen.

18/19. June thunderstorm's pictorial observations »

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387 Aquitania

387 Aquitania

18.6.2022 at 00.44 - 00.51 - Orimattila, Artjärvi, Tähtikallio (III)
Kari Laihia, Tomi Taskinen, Toni Veikkolainen, Porin Karhunvartijat

387 The asteroid in the central zone of the main zone of Aquitaine (A894 EC, 1894 AZ, 1945 NA, 1948 BG, 1953 EO1) was photographed on the first night of the June 2022 work. The asteroid of the Postrema family was discovered by the French Fernand Courty (1862 -1921) at the Bordeaux Observatory on March 5, 1894, Fernand Courty, who served as assistant astronomer at the Bordeaux Observatory, has found a total of 2 asteroids. Source Wikipedia https://en.wikipedia.org/wiki/Fernand_Courty . The Bordeaux Observatory has been in operation since 1879-2016 and includes several historic telescopes. Sourc...

Images: 3 pcs • Comments: 2 pcs

Observation information »

Image of an exceptional thunder cloud

Image of an exceptional thunder cloud

28.6.2022 at 05.33 - Mustasaari, Helsingby (III)
Sebastian Sainio

A handsome anvil cloud appeared eastward early this morning. The temperature was pleasant (compared to noon) +17 degrees humid. The summer morning feeling was really in place. The mist raft above ground level and the shadows cast by thunder clouds into the hazy air added to the atmosphere.

Comments: 2 pcs

Observation information »

Sun

Sun

27.6.2022 at 11.15 - Porkkala, Kirkkonummi (V)
Ben Kalland, Ursa (Helsinki)

Sunspot 3038. Sunny weather, of course, favors description but heat usually means poor seeing. Using a meter, I found a place on the plot where seeing was good. Steady wind and water surface a few meters away. I reduced the imaging area (ROI) of the sensor, got a faster shooting speed, and in half a minute I got a couple thousand images of which I stacked a few hundred. With this technique, I got clearly more details visible. My goal is to take a high resolution picture of the whole sun but making a mosaic is so challenging that I try to learn how to get more out of the bigger sensor. Lunt 80 ...

Comments: 2 pcs

Observation information »

Moon and Venus

Moon and Venus

26.6.2022 at 03.07 - Turku (III)
Paula Mattila

The crescent moon rose into the clear sky and was still able to separate the planet Venus before sunrise with the naked eye.

Comments: 3 pcs

Observation information »

Anticrepuscular rays

Anticrepuscular rays

26.6.2022 at 23.14 - Helsinki (III)
Tuomas Salo, Ursa (Helsinki)

I photographed the twilight rays from the balcony.

Images: 2 pcs • Comments: 1 pcs

Observation information »

Sun

Sun

26.6.2022 at 11.15 - Helsinki (IV)
Samuli Vuorinen, Kirkkonummen komeetta

Over the early summer, I built Sol’Ex spectral heliography according to Christian Buil’s instructions . The device can capture the sun at any wavelength of visible light. Attached is an image of the chromosphere of the sun this morning in the light of the H-alpha wavelength (656 nanometers).

Comments: 1 pcs

Observation information »

Sun

Sun

26.6.2022 at 15.34 - Luvia (II)
Elias Järvenpää, Tampereen Ursa

I got this kind of picture of the sun, a pretty basic telescope, the Bresser telescope. Lens 20 mm.

Comments: 1 pcs

Observation information »

Hyvin heikkoja yöpilviä

Hyvin heikkoja yöpilviä

26.6.2022 at 00.40 - 01.10 - Vantaa, Pähkinärinne (I)
Paula Wirtanen, Ursa (Helsinki)

With the naked eye I imagined seeing something miscellaneous in the northwest, since then I no longer saw that trace. In the situation of observation, it was difficult to say at all whether or not there might be a night cloud there. In the end, I came to the conclusion that that night cloud might not be, but just because of the twilight rays, I took a photo of the area for sure. However, when examining and processing the photograph, it appears that there is a very delicate and dim belt illuminating the night cloud, which looks quite similar to the observations made by others from the same dire...

Comments: 1 pcs

Observation information »

Hyvin heikkoja yöpilviä

Hyvin heikkoja yöpilviä

25.6.2022 at 01.00 - 02.30 - Kangasala (I)
Tero Sipinen, Ursa (Etelä-Suomi)

The camera captures dim illuminated night clouds from the twilight rays. Attached is a sample of roughly the best (least weak) moment (1.32) in the standard and USM versions. From the USMatted version of the timelapset recording, I estimate the cloud time to be about 1.00-2.30.

Images: 2 pcs • Comments: 1 pcs

Observation information »

A fireball in a twilight sky

A fireball in a twilight sky

25.6.2022 at 01.33 - Mäntsälä (III)
Heikki Luoto

Flew low over, no final flight was seen, disappeared into the woods. Screenshot of the video recording.

Comments: 3 pcs

Observation information »

Skywarden is an observation system maintained by Ursa Astronomical Association. Available observation categories consist of different astronomical and atmospheric phenomena. You are welcome to participate even though you are not member of any Finnish astronomical associations. Easiest way to start browsing observation is by selecting observations with images and stories on the left side of the screen. Answers to your questions about the system can be found from FAQ -page.