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Re: MARS HYBRID DESIGN II (First Draft)
Brian 12:35 PM CT 3/5/96
> >Kelly Starks x7066 MS 10-39 wrote:
> > Pluto moves MUCH faster than Earth. Your mirror would quickly move out
> > the beam. even if the beam was larger than Earths orbit.
> >Pluto's mean orbital velocity is 4.74 km/sec.
> >Earth's mean orbital velocity is 29.79 km/sec.
> Why is the mean orbital velocity of Pluto 4.74 compared to a much larger
> 29.79. Did you get the numbers mixed up. I'm confused.
>Nope, you can even do the math yourself. I got the numbers
>from the LANL solar system web site, though. Let's see if
>we can do this ourselves:
>Earth orbits at around 148,800,000 km from the sun, right?
>That's a circumference of 934,937,974 km. It does this
>in around 365.25 days, or 31,557,600 seconds. That gives us
>29.63 km/sec. Pretty close to the LANL value. I assumed
>it was a perfect circle, and it's not. Okay, now let's try
>Pluto. It orbits at 5,913,520,000 km (around 39.74 AU).
>It revolves around the sun once every 248.54 years, or
>7,843,325,904 seconds. The circumference of Pluto's orbit
>is 37,155,741,978 km. That gives us 4.74 km/sec. Wow,
>dead on to LANL's value. I must say I'm impressed,
>especially considering the eccentricity of Pluto's orbit.
>I assume the mean distance value is for an "equivalent circle".
>That would explain the accuracy of my results.
So Pluto does go slower?