Stationary dark UFO over Deming, New Mexico

On December 21, 2015, a stationary UFO has been photographed by an automobilist driving on a road, located in the city of Deming, in New Mexico. What is it?

Witness statement:

Traveling today westbound I-10 near Deming NM we noticed a stationary dark object in the sky. Weather was clear and it was during sunset so object was very clear to see. Stared at it a good 20 minutes and it never moved. There were no nav lights or strobes like a aircraft or helicopter. Lost sight of object as darkness fell.