moon halos, red and normal rainbows
Taken by Stefan Ziegenbalg on July 10, 2017 @ Pulsnitz, Saxony, Germany
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Yesterday, on July 10, we had a moon halo display, red rainbows and, just for completeness, also a normal one. The halo display consists in a 22° ring, a moondog, Circumzenithal arc, Supralateral arc (or 46° ring?) and upper and lower tangent arc. The image was shoot at 00:15 local time. At sunset (22:18) a red rainbow with supernumerary bow and also a weak secondary bow appeared. Because the light was dominated by one wavelength the contrast of the supernumerary bow is unusually high. About 10 minutes earlier a not that red rainbow was visible, lets call it orange. A normal colored rainbow appeared at 18:18.
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I do not see the lower tangent arc - the moon is too low for it. But instead, there is a faint 9 degrees ring in the display. The 46 degrees halo is the supralateral arc indeed, since it is tangent to the circumzenithal arc although moon elevation is less than 22 degrees.
Posted by pphv 2017-07-12 14:02:51
 
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