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Ursa Astronomical Association

One halo form - 24.7.2021 at 00.00 - 24.7.2021 at 00.20 Juva Observation number 99886

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Petri Martikainen, Ursa (Itä-Suomi)

I photographed with a drone the full moon moon bridge at Saimaa Luonter. Surprisingly, the pictures also showed the left side moon, which I didn’t even see from my observation site, as the Moon was still behind the forest (Figures 1-3). The moon bridge had bent strongly to the left in the pictures. Bonus images 4-5 taken an hour later no longer show the side moon, but I put them with this because the wave has bent the moon bridge to the right in them.

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Additional information
  • The halo was caused by lightsource:
    • Moonlight
  • Where are the ice crystals of the halo located?
    • Upper clouds
  • Yleiset halomuodot (kuunvalo)
    • Sivuaurinko
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