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

🇺🇸 N355CK - Gates Learjet 35 - AirNet II USC84 - 4.1 mi away @ 1850 ft, heading SE at 273 mph. Spotted 15x before! [09:21:58 PM CDT] #A3F79C #N355CK #LJ35 #STAR_CHECK #USC84 #ADSB #ADSBbot