On 9/29/2011 10:23 PM, Onno Meyer wrote:
I was using this table, but it seems I took the wrong line:
http://www.projectrho.com/rocket/appmissiontable.php#id--Erik_Max_Francis'_Mission_Tables--Delta_V_Required_for_Travel_Using_Hohmann_Orbits
That table includes additional costs for entering Earth orbit, and
realistically that cost is pretty variable. It requires a 3.7 kps burn
to take a comet in a 30 AU circular orbit and get it onto an elliptical
orbit with aphelion at 1 AU. It takes an 11.8 kps burn to take that
comet and recircularize its orbit at 1 AU, in fairly deep space. To
instead enter low Earth orbit takes anywhere from 8.4 to 23 kps,
depending on your thrust; at your designed thrust, expect to take nearer
the maximum cost. Stopping in far earth orbit can probably be managed
for a bit less than the deep space cost.
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