Actual planetary locations on December 23, 2012 show a close fit to the Christchurch sky images, except for a possible omission of planet Earth:
Could the unknown object be a bright comet, or even the enigmatic "planet X"? In the second part of Avebury Manor on July 22, 2008, a large comet-like object was shown flying past Earth and Moon on December 23, 2012. One particular image from the Christchurch sky display seems quite similar to the crop picture: