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

🇺🇸 N626SY - EMBRAER S A ERJ 170-200 LL - SKYWEST AIRLINES INC SKW5503/OO5503, Denver (DEN) to Piedmont Triad (GSO) - 4.3 mi away @ 35575 ft, heading ESE at 460 mph. Spotted for first time! [08:42:32 PM CDT] #A82E2E #N626SY #E170 #SKW5503 #OO5503 #autopilot #ADSB #ADSBbot