Ursa Major Handle Offset

Per Skymap, Ursa Major's handle should be pointing NE at 20:10 PM, not East, and does more than a 90° twist by 4:30 AM the next morning. It does a 180°. At that time, the handle should be pointing directly up at the dome, not South. The handle rotation is delayed.

Saturday Apr 16 at 20:10 PM MDT Ursa Major was in NE quad with handle pointing East. Sunday Apr17 at 4:30 AM MDT dipper had rotated 90 degrees and handle was South. The rotation must take place between 24:00 and 03:00.
El Paso