Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N842UA - Airbus A319 131 - United Airlines UAL502/UA502, Nashville (BNA) to Denver (DEN) - 4.6 mi away @ 37975 ft, heading W at 516 mph. Spotted 21x before! [11:09:10 AM CDT] #AB890A #N842UA #A319 #UNITED #UAL502 #UA502 #ADSB #ADSBbot