On Mon, 20 Jun 2005 15:56:35 GMT, lal_truckee <lal_truckee@xxxxxxxxx>
>I'm having trouble finding definitive timing for the event. The sites
>I've found a unclear.
>Does anyone have a cite for the exact anticipated impact time? Does that
>include a speed of light ajustment or not? What is the light-distance to
>the impact location?
>In other words what exact time should I be watching if I want to see any
>discernable visual variations in Tempel as it happens?
>(Putting aside relativity quibbles for the moment, please.)
The mission fact sheet on the Deep Impact (JPL) site gives the impact
time as 0600 4 July 2005 UT. I've seen that same time elsewhere. I would
assume that this doesn't take into consideration light time. The comet's
distance at impact is about 0.85 AU, so figure 7 minutes light time. I
would also assume that a final impact time (near 0600 UT) will be
published soon (or maybe already has).
Chris L Peterson