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Ursa Astronomical Association

Quiet aurora arc - 1.11.2017 at 23.20 - 1.11.2017 at 23.45 Rovaniemi Observation number 67977

Visibility II / V

Sari Pietikäinen, Corona Borealis, Rovaniemi

Let me decide to go out and hurry the camera as soon as the clouds periodically stayed away. The bright moon disturbed what was rising, but the reposet was recorded nicely. I tried to get the Milky Way in the same picture, but it doesn’t really stand out in that amount of light.
The first picture was taken at 23.32 and the second at 23.40. The fires disappeared at around 23.45, and the toes began to be so icy that it was better to leave.
However, #bongaalinnunrata is still here :)

More similar observations
Additional information
  • Aurora brightness
    • Dim auroras
  • Observed aurora forms
    • Arc info

      ARC The arcs are wider than the bands and do not fold as strongly. The arcs are normally neither very bright nor active.

      The arc is probably the most common form of aurora. When aurora show is a calm arc in the low northern sky it often doesn’t evolve to anything more during night. In more active shows the arc is often the first form to appear and the last to disappear.

      The lower edge of the arc is usually sharp but the upper edge can gradually blend into the background sky. As activity increases rays and folds normally develop, and the arcs turn gradually into bands.

      An aurora arc runs across the picture. Vertical shapes are rays. Photo by Atacan Ergin.

      Aurora Arc. Photo by Mauri Korpi.

      Aurora Arc. Photo by Anna-Liisa Sarajärvi.

      Aurora Arc. Photo by Matti Asumalahti.

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