Turns out it was Rocket Lab launching its 10th Electron rocket from Mahia Peninsula shortly before 9.20pm.
The mission - named Running Out Of Fingers - had seven satellites for commercial "ride-share" customers on board.
What a way to close out another year of Electron launches. A perfect mission + successful guided re-entry of stage 1 as we work towards reusable rockets. Congrats to @SpaceflightInc, @ALE_StarAle & @AlbaOrbital - we hope your satellites are enjoying their new home on orbit.🚀 pic.twitter.com/bnjCXrQZlS
Rocket Lab CEO and founder Peter Beck said it was a "significant milestone" given its 100 per cent success rate at getting 47 satellites into space on its "ride-share" missions.
"The stage made it through the harsh re-entry environment intact, which is an outstanding result for a first test of our recovery systems.
"It's a huge testament to the relentless drive and commitment of our team that we've reached 10 flights in just our second year of commercial launches," Beck said.
Rocket Lab's next mission will take place within the first weeks of 2020.