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

🇺🇸 N628SY - EMBRAER S A ERJ 170-200 LL - SKYWEST AIRLINES INC SKW4703/OO4703, Denver (DEN) to Asheville Regional (AVL) - 4.4 mi away @ 36550 ft, heading ESE at 498 mph. Spotted for first time! [01:04:31 PM CDT] #A8359C #N628SY #E75L #SKW4703 #OO4703 #autopilot #ADSB #ADSBbot