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

🇺🇸 N999LB - Bombardier Learjet 75 - Speedbird Inc N999LB - 5.1 mi away @ 41425 ft, heading E at 627 mph. Spotted 2x before. [03:17:18 PM CST] #ADF50E #N999LB #LJ75 #N999LB #ADSB #ADSBbot