Strange thing that changed into a pearl.

It was a Sunday mid afternoon, where I and a co-worker finished our shift in the Humane Society of NY on a Sunday afternoon.  We walked to 3rd or Lexington Avenue and 59th Street, cant remember off hand, but there were a lot of people.  
At the corner, I noticed a male model whose name I cant remember, but he was Scandinavian-looking with long blond hair and was often featured shirtless in the  80's ads.  I pointed him out to my coworker and she said oh yeah uh huh.  He walked past us while talking to a male companion and as I had turned to look at him, I noticed a thing flying in the Eastern sky.  
It was odd looking, with a multi-angled shaped top and a grey brown box below it, like an engine.  It flew noiselessly emitting a little dark smoke.  
I stared at it and pointed to it exclaiming, (name deleted)! look! what's that.  (name deleted) was exhausted and replied "Oh I dont know while yawning."  I thought it was strange that she expressed no interest. 
The thing flew directly above the Queensboro bridge and stood there.  We stared and it did something even stranger.  The craft morphed itself into a spherical white metallic ball.  It resembled a pearl in the sky.  There were clouds above it and the white pearl could still be seen.  It reflected a little of the sun on its surface.  It stayed there not moving.  We stood and look amongst the crowds and no one noticed.  We left after a while since there was no change occuring.
Witness indicates that the date of the sighting is approximate.  One of two reports from same source, who elects to remain semi-anonymous.  PD