Elliptical Coronas from Mother Nature. The corona here is not the cigar but ring of light produced by forward scattering of light from the sun or moon. This corona is usually due to a think wisps of clouds between our eyes and the sun or moon. Light from these bodies heading our way is forward scattered the tiny water droplets that comprise the cloud. Like rainbows, the light we see from the corona takes the form of colored rings.
Spherical drops give circular rings.
If the cloud above is littered with ice crystals the rings may consist of dots of light or arcs of light above and below and left and right of the sun or moon. They are still nice circular features and, like a rainbow, there are sometimes pop up in multiples. As many as three nested corona rings have been observed. The higher up in the air are the water drops the bigger the rings. In addition, the corona were not circles but ellipses with the long axis in the vertical direction.