Moving Orb is a Wavy Wonder

Photo date: December 19, 2015. Photographer: Mark Mahin.

The photo below was taken in Grand Central Terminal in New York.  We a blue orb that seems to be moving very fast, in an undulating manner (as we also see in these 20 photos).  We also see the "string of pearls" effect shown in this series of photos, in which we see position states of a moving orb that resemble pearls on a pearl necklace.

Below is the larger photo from which this photo was cropped.

I get moving orbs in my photos very frequently at this location.