Re: Lowest orbit and DeltaV
- From: charliexmurphy@xxxxxxxxx
- Date: Thu, 12 Jun 2008 09:00:10 -0700 (PDT)
On Jun 12, 8:20 am, "Jim Relsh" <jre...@xxxxxxxxxxxxxx> wrote:
"Jeff Findley" <jeff.find...@xxxxxxxxxxxxxx> wrote in message
news:6d45b$484feaac$927a2cda$8517@xxxxxxxxxxx
"Jim Relsh" <jre...@xxxxxxxxxxxxxx> wrote in message
news:47f76$484fa12a$23972@xxxxxxxxxxxxxxxxxxxx
What's the lowest practical orbit for a satellite to be in? I think I
read somewhere that it was about 150km or so, but I keep wondering how
they determine this. And what is the corresponding DeltaV to get into
that orbit?
Not to sound like President Clinton, but that all depends on how you
define the word practical.
The ballistic coefficient of an object in a very low earth orbit has a
huge impact on how long it takes that object's orbit to decay. You could
determine the minimum orbital altitude which would keep a one ton sphere
of depleted uranium in orbit for a day, but is that really practical? Who
would orbit such a thing for such a short period of time?
OK, let's assume I'm trying to put a mass of 1kg with the shape and size of
a carton of milk in orbit for a minimum duration of 2 years. What altitude
and DeltaV would I need for this:? Is it enough to know altitude and
calculate DeltaV with the webform at:http://home.att.net/~ntdoug/UCM2.html.
How would I determine the altitude?
** Posted fromhttp://www.teranews.com**
That is a orbital velocity calculator and not a delta V calculator for
launch into orbit.
You won't get a quick and easy answer, it would take some number
crunching
.
- References:
- Lowest orbit and DeltaV
- From: Jim Relsh
- Re: Lowest orbit and DeltaV
- From: Jeff Findley
- Re: Lowest orbit and DeltaV
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