Photo date: December 9, 2014. Photographer: Mark Mahin.
In this photo taken from a balcony at Grand Central Station (where there was only clean air in front of me), we see a big bright blue orb near the American flag. At 259 pixels, the orb is 15% of the height of the original photo (1671 pixels). According to those who say that orbs are just dust, dust orbs cannot be bigger than 10% of the photo height. Click to see the full image.
There are two orbs (notice the other one on the left). Here is a closeup of the brighter orb.
Note the prominent outer ring or crust, and the small red feature in the middle.