AKM e.V. Forum

fyi.Telescope site after last collapse, the movable "pick up antenna" has dropped now on top of reflector... https://www.theguardian.com/world/2020/dec/01/arecibo-radio-telescope-collapses-puerto-rico https://www.noticel.com/galeria/20201201/imagenes-aereas-exclusivas-del-colapso-del-observatorio-de...

thanks for asking :) If I will ever build (or paying someone to build) a house, most propably I will not built a house like this. I do not know how the materials are suitable for four differtent seasons in Finland, in longer time-scale. I mean like 30 years or more... Otherwise it would be nice to v...

fyi, I did not found any other category, so share this here...
https://skyandtelescope.org/astronomy-n ... ismantled/
as mentioned in text, "beyond repair"

fyi
https://portfolio.sotamaa.net/Meteorite
https://puuinfo.fi/arkkitehtuuri/puupal ... meteorite/

fyi. Observation from Kouvola, Finland (6.9.2020)
https://www.taivaanvahti.fi/observations/show/94256

primary reflection bow, 13.10.2020 Jyväskylä & Finland....
https://www.taivaanvahti.fi/observations/show/94236

Well developed reflection bows (pri & sec) -> 13.10.2020 Jyväskylä & Finland
https://www.taivaanvahti.fi/observations/show/94227

another bow -> 10.10.2020 Tornio & Finland
https://www.taivaanvahti.fi/observations/show/94223

Last night was a good one :-) I attach one sample of my images. Got still shutter problems with my old Nikon D200. But managed to get some photos at least. This one is taken at 02:10 local time. Direction to east sky... The display did not have all the brightest auroras. Couple of more brighter auro...

I also checked, and in Audacity you can "transfer" the sounds of bats to frequency range - where it can be heard by human ears. It was a bit similar sound, what is usually heard in bat detector...

thanks for comments. What I have been there is also "social sounds" that bats use, some of them might be under 20kHz ? I remember once entering a barn, to pick up firewood. It happaned approx one month / two months ago. I had mosquitos flying around me. I went indise of barn. Did start to hear occas...

fyi, continuing with 2020 halos... Light pillars at Kalajoki / Finland (22.9.2020)
https://www.taivaanvahti.fi/observations/show/93817
https://www.taivaanvahti.fi/observations/show/93816

Juva / Finland, 11.9.2020 -> 3rd and 4th order bows. Scroll down the page to see image...
https://www.taivaanvahti.fi/observations/show/93585

12.9.2020 at Muonio & Finland...
https://www.taivaanvahti.fi/observations/show/93599

timestamp that is visible on Taivaanvahti observation title (together with date), that is current local time. Now it is UTC+3h (summertime). If there is timelabel on images, on most cases it is UTC time (not 100% still). This case was seen at 20:03 UTC.

just wondering, has anyone observed this ? I have not visited yet in Germany, I assume you still have more distant areas, that have less human created noises ? here is two samples of flying mammals sounds :-) http://timokuhmonen.kuvat.fi/audio/spectrograms/2020-08-20_zoom-H5_audio0002_spectrogram001...

Lieto / Finland at 6.9.2020 (both 3rd and 4th order bows) https://www.taivaanvahti.fi/observations/show/93429 Elmar, if referring third image in this observation, how did you see traces of possible (?) 5th order... I tried to increase heavily saturation and also put strong USM sharpening at GIMP. (...

Okay...some crude calculations from the limited image data available: hello, Did you make the analysis, with common known equations, or do you have a specific software or tools ? I know there is already more precise analysis done here in Finland. That data is currently available to only members of ...

Observation from 7.9.2020, fireball duration 20+ seconds... https://www.taivaanvahti.fi/observations/show/93504 https://www.taivaanvahti.fi/observations/show/93529 https://www.taivaanvahti.fi/observations/show/93517 All observations from same event here... https://www.taivaanvahti.fi/observations/br...

Elmar Schmidt hat geschrieben: ↑

9. Sep 2020, 06:34

The third image seems to show a trace of the 5th order, too.

Elmar

link to observation...?

Observation from Kurenpolvi, Finland (31.8.2020). There is only a small fragment visible (primary reflection bow) https://www.taivaanvahti.fi/observations/show/93277 fyi. I forgot to mention, that this observation has also weak secondary reflection bow (in addition to primary reflection bow). There...