Die Suche ergab 460 Treffer

von Timo Kuhmonen
10. Jun 2021, 19:53
Forum: Polarlicht und Astronomie
Thema: Partielle Sonnenfinsternis über Deutschland 10.6.2021
Antworten: 39
Zugriffe: 2501

Re: Partielle Sonnenfinsternis über Deutschland 10.6.2021

My own observation image, from central Finland. Image is taken at C8 OTA with 40mm plössl EP, using mobile phone camera (11:16 UTC). Green color is due to Baader solar continuum filter. I could not see clear active regions here, could be due to not perfect camera focusing...
von Timo Kuhmonen
10. Jun 2021, 19:25
Forum: Polarlicht und Astronomie
Thema: Partielle Sonnenfinsternis über Deutschland 10.6.2021
Antworten: 39
Zugriffe: 2501

Re: Partielle Sonnenfinsternis über Deutschland 10.6.2021

One question to ask. Is there a known "limit" where even a partial solar eclipse starts to affect measured ambient temperatures? The solar radiation power will be smaller, if large enough of the sun area is blocked by the moon. There is some known power values of sun radiation per square m...
von Timo Kuhmonen
10. Jun 2021, 19:09
Forum: Polarlicht und Astronomie
Thema: Partielle Sonnenfinsternis über Deutschland 10.6.2021
Antworten: 39
Zugriffe: 2501

Re: Partielle Sonnenfinsternis über Deutschland 10.6.2021

fyi. For those interested, below is solar eclipse observation from Hankasalmi & Finland, on 10 GHz band (3 meter antenna diameter) https://www.taivaanvahti.fi/observations/show/98861 And other image taken at Rovaniemi & Finland https://www.is.fi/kotimaa/art-2000008045478.html?utm_medium=prom...
von Timo Kuhmonen
10. Jun 2021, 13:38
Forum: Polarlicht und Astronomie
Thema: Partielle Sonnenfinsternis über Deutschland 10.6.2021
Antworten: 39
Zugriffe: 2501

Re: Partielle Sonnenfinsternis über Deutschland 10.6.2021

fyi, I managed to follow also solar eclipse (C8 OTA, Baader solar foil, Baader solar continuum filter, 40mm plössl). Visually it was easy to see variations in moon "border", most propably caused by higher mountain peaks. Visually the most suitable was 40mm eyepiece. I did not notice clear ...
von Timo Kuhmonen
9. Jun 2021, 11:08
Forum: Polarlicht und Astronomie
Thema: Partielle Sonnenfinsternis über Deutschland 10.6.2021
Antworten: 39
Zugriffe: 2501

Re: Partielle Sonnenfinsternis über Deutschland 10.6.2021

fyi, weather forecast here in central Finland, has clear sky estimates for tomorrow, starting around 12 local time. I try to setup my C8 OTA with tracking mount for solar observation. Has anyone tried LDR to follow ambient light levels ? It would not propably be very precise & scientific :-) but...
von Timo Kuhmonen
5. Jun 2021, 08:18
Forum: Leuchtende Nachtwolken (NLC)
Thema: NLC 2021-06-04/05
Antworten: 12
Zugriffe: 804

Re: NLC 2021-06-04/05

...Simon already posted a link to last night NLC´s on Taivaanvahti... This post can be deleted....
von Timo Kuhmonen
30. Mai 2021, 16:54
Forum: Polarlicht und Astronomie
Thema: Partielle Sonnenfinsternis über Deutschland 10.6.2021
Antworten: 39
Zugriffe: 2501

Re: Partielle Sonnenfinsternis über Deutschland 10.6.2021

I saw Finnish astronomical association (URSA) info of this event. Location where I am now, is on central Finland. Approximately 45% of sun disk is blocked here (see table and "pimennys-%"). In northern Finland the eclipse is a bit deeper. https://www.ursa.fi/pimennys2021.html Based on comm...
von Timo Kuhmonen
29. Mai 2021, 15:28
Forum: Halos und atmosphärische Erscheinungen
Thema: Höhere Regenbogenordnungen, 2021-05-25, Hörlitz
Antworten: 8
Zugriffe: 334

Re: Höhere Regenbogenordnungen, 2021-05-25, Hörlitz

Thanks for reply, good points there... I would also be interested to see linked articles / papers, cannot see those currently due to "payment wall". If I do any test with that narrowband filter (related to rainbows), maybe enhancing the interference bows visibility. The filter that I menti...
von Timo Kuhmonen
28. Mai 2021, 16:42
Forum: Halos und atmosphärische Erscheinungen
Thema: Höhere Regenbogenordnungen, 2021-05-25, Hörlitz
Antworten: 8
Zugriffe: 334

Re: Höhere Regenbogenordnungen, 2021-05-25, Hörlitz

Interesting images :-) Question related to the 5th bow photo attempting... Has there been test(s) whether if green filters would produce any results, for example in the cameras using monocrome sensor ? Based on Les Cowleys site, some of the green band of 5th bow is located between the primary and se...
von Timo Kuhmonen
16. Mai 2021, 13:21
Forum: Off-Topic
Thema: Ultrasonic soundscape under nightsky
Antworten: 4
Zugriffe: 1305

Re: Ultrasonic soundscape under nightsky

FYI. on beginning of this week, there was couple of days with lot warmer conditions at Finland. Some places more than +25C temperatures. I also made some tests with my Zoom H5 recorder, for capturing environment sounds. That is because I get basic info of a recording, in case I later put on a perman...
von Timo Kuhmonen
3. Mai 2021, 21:21
Forum: Meteore
Thema: Fireball - Northern Finland & Sweden (2020-12-04)
Antworten: 1
Zugriffe: 426

Re: Fireball - Northern Finland & Sweden (2020-12-04)

fyi,

some addional data presented on Juha Vierinen YouTube channel from this case. At end of video, there is mentioned scientific paper coming out for study this case (no schedule published yet...)
https://www.youtube.com/watch?v=6pYSFzfGjMI
von Timo Kuhmonen
19. Apr 2021, 21:30
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 41
Zugriffe: 7490

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

M20210419_213857_+P.jpg fyi, little bit of aurora activity right now, on central Finland. Watec meteor cameras could see band on low northern sky. Just came also outside, visually confirmed. The band (approx 15 degrees height) is weak and diffuse. No moving forms of aurora seen. Moonlight is reduci...
von Timo Kuhmonen
15. Apr 2021, 20:48
Forum: Halos und atmosphärische Erscheinungen
Thema: [Halo] 2021-04-13 Reflection subsun, Taivaanvahti
Antworten: 1
Zugriffe: 387

[Halo] 2021-04-13 Reflection subsun, Taivaanvahti

fyi, This is the case where I posted links on the Zoom session at 14.4.2021. I put these also on forum, if someone is interested :-) From this case there is now six observations https://www.taivaanvahti.fi/observations/browse/pics/3826760/observation_id/desc/0/20 Same observations on map https://www...
von Timo Kuhmonen
24. Mär 2021, 22:32
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 41
Zugriffe: 7490

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

fyi, observing auroras on central Finland this night. I saw one "set" of auroras on northern sky, between 21:40...21:50 UTC. Those were not the strongest here visually. Maybe too weak ones, so that it could be seen -or photographed- on central europe ?
von Timo Kuhmonen
18. Mär 2021, 20:29
Forum: Halos und atmosphärische Erscheinungen
Thema: [Halo] Pyramid halos, Finland (various years...)
Antworten: 5
Zugriffe: 1009

Re: [Halo] Pyramid halos, Finland (various years...)

another one from Rovaniemi / Finland at 18.3.2021 --> 28° ring halo [Scheiner]
https://www.taivaanvahti.fi/observations/show/96861
von Timo Kuhmonen
4. Mär 2021, 22:54
Forum: Polarlicht und Astronomie
Thema: 2021-03-02: Fotografisches Polarlicht
Antworten: 20
Zugriffe: 2116

Re: 2021-03-02: Fotografisches Polarlicht

fyi, couple of other STEVE's in Taivaanvahti, for 2nd March 2021... https://www.taivaanvahti.fi/observations/show/96401 https://www.taivaanvahti.fi/observations/show/96411 https://www.taivaanvahti.fi/observations/show/96402 The map looks interesting, propably need to look text more pricisely... EDIT...
von Timo Kuhmonen
1. Mär 2021, 20:48
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 41
Zugriffe: 7490

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

fyi,

today around 19:49 UTC, in central Finland I saw auroras moving at northern low sky (Watec 910). Looks like the same time a bit of drop in magnetic field values (at SGO magnetogram)....