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

🇺🇸 N252NN - Embraer EMB-175 LR - American Eagle ENY3596/MQ3596, Chicago O'Hare (ORD) to Austin-Bergstrom (AUS) - 4.4 mi away @ 34975 ft, heading SW at 488 mph. Spotted 45x before. [10:06:30 PM CST] #A26025 #N252NN #E75L #ENVOY #ENY3596 #MQ3596 #autopilot #ADSB #ADSBbot