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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

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


4.4.2020 at 20.27 - Turku
Aimo Niemi, Turun Ursa

Test image with an experimental telescope whose main mirror is a plastic paraboloid. The mirror is made by rotating a mold filled with cast plastic for about 20 hours at a speed of 33.3 rpm.

Comments: 4 pcs

Lightning photo

12.8.2013 at 22.53 - Turku (III)
Aimo Niemi, Turun Ursa

Here is a report of a failed observation attempt. The intent was to photograph a star flight flock of Perseids, but none of the 352 attempts were spiked. I tried to shoot the same area of the sky all night with continuous shooting and an 8-second shutter speed, hoping to hit one of the shots, but that plan produced a watershed. The battery lasted only a couple of hours and no hits came. Even outside the shooting range, I managed to see star flights only a few weak and a couple of brighter ones. Due to the terrain, the viewing direction was not optimal when the trees covered almost half of the ...

Search result contains observations from time period 1.1.2000 klo 00.00 - 27.5.2022 klo 22.37.