There was a Falcon 9 launch from Florida at 16:35 UTC and the upper stage prop dump is usually around 2 hrs after launch so it may have been this.
British Astronomical Association
Supporting amateur astronomers since 1890
Supporting amateur astronomers since 1890
There was a Falcon 9 launch from Florida at 16:35 UTC and the upper stage prop dump is usually around 2 hrs after launch so it may have been this.