At the time of writing, it appears to be staying for at least the night.
UPDATE! On Thursday 12 September, VH-MMC departed Emerald Airport and returned to the Sunshine Coast.
Meanwhile, a couple of nice corporate turboprop aircraft to be noted visiting CQ also on Wednesday 11 September included Brisbane-based SOCATA TBM 700 VH-PGA which visited Moura Airport from its Archerfield base. While Edwards Coaches Cessna 441 Conquest II VH-OXY was noted visiting Biloela / Thangool Airport from its Armidale (New South Wales) base.