Dark odd-shaped-UFO over Las Vegas, Nevada

On November 13, 2018 at 5:13PM, a dark odd-shaped UFO is appeared in sky over Las Vegas, Nevada. It did not move.

Witness report:

I was driving to work November 3rd in Las Vegas. I saw this object in the sky not moving on my 22 minutes drive. Once to the casino at Red Rock resort I parked on the top level 6th floor of the garage to observe the object better still thinking it had to be a balloon yet it was not teathered to anything around the ground.I took these three photos and still cannot seem to know what it could be hovering stationary above the skyline.

https://mufoncms.com/cgi-bin/report_handler.pl?req=view_long_desc&id=96357, 14th November 2018