Operated by Melbourne based Jetcity, Challenger 604
N604AU is seen in the photo having arrived at Wellington 25Sep from Napier. The Challenger had arrived at Wanganui from Sydney and Palmerston North 18Sep and flew back to Palmerston North 23Sep before then heading to Napier 24Sep. Its movements seem to be partially aligned to significant charter activity around NZ with the likes of Metro POB, POF, Boeing 737-200 NQC, Chieftain VIP, Jetstream JSH, Convair CIF, Titan NDY, Cessna 402 VAD and King Air MKG all employed in some way or another.
N604AU departed Wellington on the afternoon of 26Sep for Brisbane.

Phil Craig photo