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

🇺🇸 N77543 - Boeing 737MAX 9 - United Airlines UAL2132/UA2132 (TUS-DEN-SMF-EWR) - 4.8 mi away @ 39300 ft, heading ENE at 594 mph. Spotted 7x before! [05:19:53 AM CDT] #AA7E9A #N77543 #B39M #UNITED #UAL2132 #UA2132 #ADSB #ADSBbot