Shot wider tonight (18mm), and I think you can safely say the tail is at least
37 degrees long, possibly out to 45-46 degrees, and if it persisted after that
it's lost in the bright Milky Way starfield. Tonight the tail was going right
over Canopus. Visually I couldn't see anything of the tail.
http://i727.photobucket.com/albums/ww271/Rob_Kau/C2011W314Jan2012taillength.jpg

At 55mm the tail extends faintly out of the bottom-left corner of my frame, a
length of 20 degrees:
http://i727.photobucket.com/albums/ww271/Rob_Kau/C2011W314Jan2012taillength55mm.\
jpg

My gear isn't really suited to this - a basic, old entry-level DSLR with cheap
lenses, on a rickety unmotorised EQ1 mount and 'guiding' through a reticle with
the slo-mo knob. It would be great if someone could repeat this with a halfway
decent imaging rig.

Cheers -

Rob Kaufman
Bright, Victoria, Australia