It was flying as "Envoy 09" and looked to fly up from Canberra. It appears to be staying for the night at Mackay Airport.
UPDATE! Early on Thursday 7 July, A56-002 "Envoy 09" departed Mackay Airport for Barcaldine Airport. It later departed Barcy and headed up to Darwin before eventually returning to Canberra well after dark.
Photo taken by David Geck ©