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von Timo Kuhmonen
23. Mär 2023, 23:21
Forum: Polarlicht und Astronomie
Thema: Polarlicht 2023-03-23/24
Antworten: 48
Zugriffe: 9572

Re: Polarlicht 2023-03-23/24

view to southern sky at my location in central Finlad, 00:54 local time... Beautiful show of different forms and colours...
von Timo Kuhmonen
17. Sep 2022, 15:30
Forum: Halos und atmosphärische Erscheinungen
Thema: Anomal breite Regenbögen (keine Bilder)
Antworten: 6
Zugriffe: 2696

Re: Anomal breite Regenbögen (keine Bilder)

In URSA halomeeting at 2006 (Artjärvi, Finland), there was one presentation held by Yuji Ayatsuka. https://www.ursa.fi/ilmakeha/tapaamiset/halomeeting-2006.html There is three cases of rainbow anomaly with explaining text... http://www.asahi-net.or.jp/~cg1y-aytk/ao/rainbow_anomaly.html It is on japa...
von Timo Kuhmonen
11. Sep 2022, 08:12
Forum: Halos und atmosphärische Erscheinungen
Thema: Anomal breite Regenbögen (keine Bilder)
Antworten: 6
Zugriffe: 2696

Re: Anomal breite Regenbögen (keine Bilder)

fyi. I have not seen that kind of rainbow anomaly myself, although there could be ones... I have made search in Taivaanvahti for all observations classified as rainbow anomaly ("anomaalinen sateenkaari" in finnish). The search time begins at 1.1.1990. Totally 37 observations were found. ht...
von Timo Kuhmonen
28. Aug 2022, 16:43
Forum: Off-Topic
Thema: Ultrasonic soundscape under nightsky
Antworten: 6
Zugriffe: 7816

Re: Ultrasonic soundscape under nightsky

fyi, last summer there was two bats captured and marked with a ring. Myotis mystacinus and Myotis brandtii. Most propably there will not be any similar capturing activity this year anymore. Couple of days ago, I captured one sample photo of flying bat, together with a view to Cygnus constellation. N...
von Timo Kuhmonen
8. Aug 2022, 19:14
Forum: Polarlicht und Astronomie
Thema: 2022-08-07/08: Polarlichtsichtungen
Antworten: 26
Zugriffe: 11251

Re: 2022-08-07/08: Polarlichtsichtungen

fyi. Auroras on my fireball camera view (at central Finland) last night....
https://www.taivaanvahti.fi/observations/show/108186
von Timo Kuhmonen
18. Jul 2022, 22:01
Forum: Leuchtende Nachtwolken (NLC)
Thema: NLC 2022-07-18/19
Antworten: 23
Zugriffe: 5719

Re: NLC 2022-07-18/19

fyi, some update here in Finland. I am currently on central Finland, here is sky cloudy... So cannot observe now visually NLC. Just now there is visible bright NLC structures on the webcam of south-west archipelago - more precisely at Utö Lighthouse webcam. It takes pictures every 5min. Does not see...
von Timo Kuhmonen
8. Jul 2022, 18:36
Forum: Halos und atmosphärische Erscheinungen
Thema: Multiple order bows / Finland
Antworten: 27
Zugriffe: 9507

Re: Multiple order bows / Finland

FYI: 3rd and 4th order bows (5.7.2022 Juva, Finland). Also primary reflection bow under same observation...
https://www.taivaanvahti.fi/observations/show/107483
von Timo Kuhmonen
14. Jun 2022, 18:58
Forum: Halos und atmosphärische Erscheinungen
Thema: Atmosphärische Erscheinungen im Juni 2022
Antworten: 35
Zugriffe: 6002

Re: Atmosphärische Erscheinungen im Juni 2022

Yesterday on central Finland - primary and secondary rainbows. Tried also to take a photo of possible 3/4 order bows, did not catch anything this time...
von Timo Kuhmonen
7. Jun 2022, 18:17
Forum: Leuchtende Nachtwolken (NLC)
Thema: NLC 2022-06-06/07
Antworten: 12
Zugriffe: 2781

Re: NLC 2022-06-06/07

fyi. Some weak NLC.s in Taivaanvahti, for southern Finland at 6/7 June 2022. Good to see season starting here also :-)
https://www.taivaanvahti.fi/observations/show/107082
https://www.taivaanvahti.fi/observations/show/107081
https://www.taivaanvahti.fi/observations/show/107085
von Timo Kuhmonen
26. Mär 2022, 20:01
Forum: Meteore
Thema: 2022-03-21 Fireball (Lake Ladoga)
Antworten: 0
Zugriffe: 483

2022-03-21 Fireball (Lake Ladoga)

FYI. I did not capture this one with my camera, one of many observations in Finland... https://www.taivaanvahti.fi/observations/show/105396 Incoming mass estimated around 10...20kg. Main fragment around 100grams fell into Lake Ladoga, not possible to search since no ice cover on strewn field area......
von Timo Kuhmonen
13. Mär 2022, 18:52
Forum: Polarlicht und Astronomie
Thema: 2022-03-13/14: Polarlichtsichtungen
Antworten: 57
Zugriffe: 27726

Re: 2022-03-13/14: Polarlichtsichtungen

fyi. First sample from central Finland today, Nikon D200 and Nikon 10.5mm/2.8. I would expect there is more stronger activity to come for the next night...
von Timo Kuhmonen
8. Mär 2022, 16:42
Forum: Off-Topic
Thema: Nikon 10.5/f2.8 AF-S DX fisheye lens issue
Antworten: 0
Zugriffe: 2613

Nikon 10.5/f2.8 AF-S DX fisheye lens issue

hi, Does anyone have similar Nikon lens on use, for example in halo photography? I do have some issues with it. I can take images with that lens, but there is some kind of extra "bright point" inside of lens cell visible. To me it looks like defect. I suspects it is a small part of chipped...
von Timo Kuhmonen
17. Feb 2022, 16:52
Forum: Polarlicht und Astronomie
Thema: Aurora photos & Newton rings
Antworten: 0
Zugriffe: 1266

Aurora photos & Newton rings

Occasionnally this could happen. There is monocromatic light from auroras. Usually the rings are visible in the center of aurora image (green most dominant light). One example here, see last image https://www.taivaanvahti.fi/observations/show/104544 I have not been able to see these interference bas...
von Timo Kuhmonen
10. Feb 2022, 18:59
Forum: Polarlicht und Astronomie
Thema: Polarlicht 2022-02-10/02-11
Antworten: 13
Zugriffe: 6236

Re: Polarlicht 2022-02-10/02-11

FYI. on my fireball camera at central Finland, auroras are visible now. In addition to that, I am observing radio aurora propagation at 50MHz ham band. OH9SIX beacons is clearly coming in aurora propagation. Today the most northern 50MHz beacon appearing on the allocated beacon "area" is J...