[AZ-Observing] Re: Deep Impact

Now I'm starting to make mistakes in my haste. Add 7.5 minutes, not 15.


Stanley A. Gorodenski wrote:

>I forgot to add the speed of light. Assuming the below, although in 30 
>minutes it would subtend an angle of 0.47 arc minutes, it takes about 7 
>and a half minutes for the sunlight to reach it, and 7 and a half to be 
>reflected back. So add 15 minutes to the 30 - still above the horizon, I 
>believe.
>Stan
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