FreeLists / az-observing / [AZ-Observing] Forward-scattering event on C/2006 P1 (McNaught)

[Brian Skiff <bas@xxxxxxxxxx>]

     Excerpt from IAU Circular 8793 issued this evening:

     J. N. Marcus writes that forward-scattering brightness
enhancement should peak in C/2006 P1, as viewed from the earth, on
Jan. 14 at a level approximately 2.3 magnitudes brighter than what
would be predicted by a standard power law (model details in Marcus
2007, ICQ, submitted).

This Circular also quotes a number of fairly experienced comet
observers in re the total magnitude, which indicate that values
around -3 are typical near Jan 11.0 - 11.5 UT.  Since this isn't
_so_ much fainter than Venus, it is certainly time to try looking
for it at midday in much the same way one would observe Venus---
and of course itself is conveniently in the sky, too, at midday.

\Brian
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