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

🇺🇸 N77575 - Boeing 737MAX 9 - United Airlines UAL281/UA281, Newark Liberty (EWR) to Austin-Bergstrom (AUS) - 4.1 mi away @ 33125 ft, heading SW at 587 mph. Spotted 4x before! [11:58:57 AM CST] #AA7F05 #N77575 #B39M #UNITED #UAL281 #UA281 #ADSB #ADSBbot