<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
samantha wrote:
<blockquote cite="mid:4BD8BC09.5010109@mac.com" type="cite">spike
wrote:
<br>
<blockquote type="cite">
<br>
<br>
<blockquote type="cite">...On Behalf Of samantha
<br>
</blockquote>
...
<br>
<blockquote type="cite">Subject: Re: [ExI] Mining the Sky SL Talk I
gave today
<br>
<br>
spike wrote:
<br>
<blockquote type="cite">...Getting humans waaaay the hell out to
2.6 AU is pretty much out of the question for now...
<br>
</blockquote>
</blockquote>
<br>
<blockquote type="cite">I am talking about ATENS which are around 1
AU. So where does 2.6 AU come from? - samantha
<br>
</blockquote>
<br>
It occurred to me that those close-in asteroids must be out of the
plane of
<br>
the ecliptic. Otherwise the gravitational influence of the other
close-in
<br>
planets would have messed up the orbit by now.
<br>
</blockquote>
<br>
They do not last long in those orbits true enough. And how they are
replenished is in part an open mystery. But in the meantime there are
enough of them of sufficient size to be worth exploiting. Also some of
the Amors come close enough to exploit during parts of their orbit.
Most are not that far out of plane. Many are in plane.
<br>
<br>
<br>
<blockquote type="cite">Samantha do you have a reference which gives
the Atens' angle to the plane?
<br>
Did you have in mind sending actual proles out there?
<br>
<br>
</blockquote>
<br>
<br>
No, only reports. I will look for one. There have been probes
exploring near earth and other asteroids.
<br>
<br>
- samantha
<br>
_______________________________________________
<br>
extropy-chat mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>
<br>
<a class="moz-txt-link-freetext" href="http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat">http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat</a>
<br>
</blockquote>
<br>
Here is one. JPL has a nice queryable database one layer in from this
link. Note that they lisst 1116 hazardous asteroids. So we know at
least that many come close enough to exploit. :)<br>
<br>
<a href="http://neo.jpl.nasa.gov/orbits/">Orbit Diagrams<br>
</a><br>
I used the ugly query here: <br>
<a
href="http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=neo;obj_kind=ast;obj_numbered=all;ast_orbit_class=ATE;ast_orbit_class=AMO;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Bt;c1_op=%3C%3D;c1_value=0.1;table_format=HTML;max_rows=10;format_option=comp;query=Generate%20Table;c_fields=AaAbAhApBgBhBiBnBrBt;c_sort=BtA;.cgifields=format_option;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=com_orbit_class&page=17">my
query</a><br>
<br>
<br>
also look at pretty diagram on<br>
<br>
<a href="http://szyzyg.arm.ac.uk/%7Espm/">Near Earth Objects Map</a><br>
<br>
and <br>
<br>
<a href="ftp://ftp.lowell.edu/pub/elgb/astorb.html">Asteroid Orbital
Elements Database</a><br>
<br>
<br>
- samantha<br>
<br>
</body>
</html>