Mystery Light

What could be the identity of this trailing light in the sky above Yellowknife, northern Canada? High altitude clouds and rays of aurora are also captured in the sky.Click on the second photo to see a sequence of photos, few minutes apart, which displays how the light appeared in the sky between 01:31 and 1:45 local summer time (GMT -6 hours) of Sep. 23, 2011. See this time-lapse video of the scene which better shows the phenomenon.