Yearly Archives: 2010

Odd-radii again

2.7.2010 0 -

Alan Clark sent the above image, which shows the same display that Elmar Schmidt saw from Virginia, and which can be read about in the previous post. Alan photographed the halo from Dulles Airport, about 120 km NE of Elmar’s…

Displays

Pyramidal halos in central Virginia

29.6.2010 3 -

Elmar Schmidt was travelling southwards after the 10th Conference on Light and Color in Nature in Maryland. He observed this spectacular pyramidal halo display in central Virginia on 22 June. The display lasted for at least 2 1/2 hours and…

Displays

Odd radii from Italy

20.6.2010 0 -

Marco Candotti sent these photos from Italy. The images were taken on 15 June. The 22 degree halo lasted about an hour, while the pyramidal crystal halos only a few minutes. For a short time, a 120 degree parhelion was…

Displays

New version of Streetlight Halos

13.6.2010 4 -

A new version of Streetlight Halos is available ( 1 ). The project took on a life of its own, to the point where it is now a monster, more than anyone will want to read in totality. There are…

Displays

Tampere Ellipse

4.6.2010 2 -

The elliptical halo display observed yesterday by Marko Riikonen and Jari Luomanen was formed – as usual – in Ac virga. Marko had been paying much attention to Ac virgas for some time, and could therefore observe the whole display…

Miscellaneous

Atmospheric optics meeting in Finland

18.5.2010 2 Jari Luomanen

14-16 May saw Finnish atmospheric optics enthusiasts gathering in Finnish Astronomical Association’s (URSA) Artjärvi observation center. The programme for the meeting included presentations on noctilucent cloud observations, halo simulations, chdk-software for compact cameras, diamond dust halo chasing as well as…

Displays

Odd radius display from Kiev

17.5.2010 0 -

Alexandr Shinder made the above panorama of the odd radius display he observed in Kiev, Ukraine on 31 March 2010. Further images can be viewed on his blog ( 1 ).

Displays

Odd radius column arcs from Joensuu

14.5.2010 2 -

Summer’s first hot weather spell started on 12 May in Finland, and along came solitary 23° plate arc. Yesterday it got warmer (+24°C) and also the halos got warmer. Odd radius column arcs! In addition to 9° and 24 column…

Halo information

Simulations on the possible new arc from Moilanen crystals

10.5.2010 6 -

Here are some simulations to follow up with the possible new arc from Moilanen crystals ( 1 ). As suggested by Marko, I did some “photo quality” simulations with the two Moilanen arcs using Jukka Ruoskanen software. The Moilanen crystals…

Displays

Sun pillar from Jersey

3.5.2010 5 -

The phenomena began about 30 minutes before sunrise (which was at 5:58am local time) and faded completely about 30 minutes after sunrise. Apart from the main sun pillar you can see faint pillars to the left of the church and…

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Yearly Archives: 2010

Odd-radii again

Pyramidal halos in central Virginia

Odd radii from Italy

New version of Streetlight Halos

Tampere Ellipse

Atmospheric optics meeting in Finland

Odd radius display from Kiev

Odd radius column arcs from Joensuu

Simulations on the possible new arc from Moilanen crystals

Sun pillar from Jersey

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