Message-ID:	<005401bd5e50$e3082b80$a8fd5fcc@eunuch.iquest.net>
From:	"ricki lee king" <rlking AT iquest DOT net>
To:	<davidD AT qimr DOT edu DOT au>, <djgpp AT delorie DOT com>,
	"ricki lee king" <rlking AT iquest DOT net>
Subject:	Re: Orbits, planets, PLEASE HELP!
Date:	Thu, 2 Apr 1998 11:03:31 -0500
MIME-Version:	1.0

-----Original Message-----
From: ricki lee king <rlking AT iquest DOT net>
To: davidD AT qimr DOT edu DOT au <davidD AT qimr DOT edu DOT au>; djgpp AT delorie DOT com
<djgpp AT delorie DOT com>
Date: Thursday, April 02, 1998 11:03 AM
Subject: Re: Orbits, planets, PLEASE HELP!


>At 11:54 PM 4/1/98 GMT, David Duffy wrote:
>>Andris Pavenis (pavenis AT laima DOT acad DOT latnet DOT lv) wrote:
>>: > From:          NOSPAMsl AT psycode DOT com (Gili)
>>: > Subject:       Re: Orbits, planets, PLEASE HELP!
>>: > > However, don't give up hope.  Accurate equations for these things
have
>>: > > not been discovered for more than two bodies.  (Look for references
on
>>: I havent seen much information about this in WWW so perhaps You'll
>>: have to go to library or bookstore.
>>
>>You will find several web sites and programs for N-body problems, with
>>some discussion of methods.  To simulate a solar system say, however,
>>unless you are a pedant, you could idealize the planetary orbits (and
>>merely calculate the orbits for spaceships etc based on the current
>>planetary positions, masses etc) or use an almanac for our solar
>>system.
>
>nasa keeps keplerian numbers on all the objects in earth orbit
>and probably all the objects in the solar system. these numbers
>look like this in a text file.
>
>date,time,,,
>body1, n1, n2, n3,,,,
>body2, n1, n2, n3,,,,
>etc.
>
>i have used satelite tracking programs
>that required this data file.
>but i have no idea how to write the formula
>that uses these numbers.
>
>i am sure you can download the file(s) from nasa.
>bye
>
>

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