[amsat-bb] Re: Close encounters of the Asteroidal Kind

Robert Bruninga bruninga at usna.edu
Fri Feb 8 06:30:34 PST 2013

> I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock?

Let's see, power goes down as 1/R squared.  So lets compare it to a
candle.  A candle is about 50 Watts or about (435000/50W) or about 10,000
times less power.  Take the square root of that to get about 100/th the

So that radar at 28,000 km will heat the surface about as much as a candle
would at 280km.  (unless I screwed up before my morning coffee)...


More information about the AMSAT-BB mailing list