SKYWATCH INCIDENT REPORT PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON Date: 03:46 12/23/2023 Callsign: DAL750 Origin: TPA Status: Closed Aircraft: B738 Destination: SEA POD: DEN Tail Number: New Destination: Reporting Facility: ZDV Operator: DAL Operator Type: Commercial Paged: YES REMARKS Aircraft reported an unidentified aerial phenomenon off the left side while NW bound at FL320, 50 NM West of DEN. The unknown phenomenon was a group of red lights circling each other at approximately FL400. The UAP was not observed on ATC facility radar system. AWO notified. SKYWATCH INCIDENT REPORT | DATE: 2023-12-23T03:46 | POD: DEN | PAGE 1 of 1