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

🇺🇸 N747YX - Embraer EMB-175 LR - United Express RPA3308/YX3308 - 3.5 mi away @ 4075 ft, heading NNE at 299 mph. Spotted 2x before! [07:53:22 PM CDT] #AA0EC7 #N747YX #E75L #BRICKYARD #RPA3308 #YX3308 #autopilot #Landing #ADSB #ADSBbot