Photo date: June 18, 2019. Photographer: Mark Mahin.
In geometry a chord is a line connecting two points on a curve. I have
13 times photographed mysterious orbs with a chord stripe in one of the
corners of the orb. Below is the 13th and latest case of this orb pattern, photographed on a night with no fog, mist, rain or precipitation.
This "corner chord" pattern is one of 20 recurring patterns I have noticed
in mysterious orbs I have photographed. The visual below shows these
patterns (see here for a post that shows lots of examples of most of these patterns).