Photo date: May 3, 2017. Photographer: Mark Mahin.
The photo below is one of many photos I have taken showing a mysterious orb on one of the little ledges high up at Grand Central Terminal. Orbs seem to love aligning to edges at this location, and here we see a double alignment. The bottom of the orb is aligned to the ledge, and the right of the orb is aligned to the window edge.