blart; we know the parameters of geocentric orbit
but what are the parameters of lunar centric orbit?
Apparently, we don't seem to know squat about the aspects of any "lunar
centric orbit".
Even those links provided by "William Mook" are remaining as illusive
as to sharing the truth and thereby failing to provide the exact
distances involved are why it's still nearly anyone's SWAG. That is
unless you've got one of those Einstein brains and/or a fully software
configured parallel supercomputer in order to work with all of the
variables.

As I'd contributed before; The LL1 or ME-L1/EM-L2 zone is offering
about as "lunar centric" of any artificial satellite orbit as it gets,
as an energy efficient halo orbiting zone for an untethered satellite,
to that of an interactive station-keeping consideration for a fully
tethered LSE alternative.

Although being a fully interactive zone in a good sort of way, this
mutual LL1 gravity-well offers us one heck of an energy efficient
'sweet-spot' worth of a parallel satellite parking zone for
accommodating the future Chinese LSE-CM/ISS, that's getting such things
just downright nifty and about as easy for keeping an eye upon as it
gets.

Most everything that's necessary for establishing and maintaining this
station-keeping position can be effectively managed via terrestrial
ground-control. Hell bells folks, this could even be flown as 4H club
or even Grade School amateur science project, along with the right
software and just a dial-up internet connection should be sufficient
for most any PC to manage the entire station-keeping requirements and
of accomplishing all sort of Earth/moon related science.

All that this sort of platform needs to incorporate is a good
Radon(Rn222) breeder reactor, whereas Radiun(Ra226)--Rn222, thus LRn
gets briefly stored and then LRn--Rn--ion thrust seems like a win-win
sort of reliable form of ion thrust for managing this platform like a
slow-motion ping pong ball within this interactive ME-L1/EM-L2 zone.

Could yourself or perhaps from other wizards contributing their
expertise suggest as to exactly where that nullification zone is at any
given time within the month by month cycle of our moon, as having to
orbit along with the somewhat off-centered and rotating Earth gravity
ant tidal influences while also having to deal with the sun and, of
every 19 months having another time extended pull contributed by Venus
just for keeping things a bit interesting. Upon average at the
Earth/moon distance of 384,400 km is supposedly having this LL1 located
at roughly 60,000 km off the lunar deck, or 16% of the Earth/moon
distance away from the lunar deck, although without further input for
the wizards of this usenet, as such that raw estimate may or may not be
the case.

BTW; That's only involving a five body equation if we're having to
include anything as for the satellite platform mass which could range
anywhere from a few initial tonnes to a rather considerable worth of
megatonnes if not a gigatonne to work with. It only becomes a 6 body
equation if having to include the lunar anchored tethers and, it gets
into an interesting 7+ body equation if there's an interactive tether
dipole element involved that's reaching to within 25,000 km of mother
Earth. Of course, there could also be a few other interactive variables
as to various automated/robotic items associated along with the
LSE-CM/ISS, in which case a full blown CRAY supercomputer might have to
get involved.

Brad Guth
~

Life upon Venus, a township w/Bridge & ET/UFO Park-n-Ride Tarmac:
http://guthvenus.tripod.com/gv-town.htm
The Russian/China LSE-CM/ISS (Lunar Space Elevator)
http://guthvenus.tripod.com/lunar-space-elevator.htm
Venus ETs, plus the updated sub-topics; Brad Guth / GASA-IEIS
http://guthvenus.tripod.com/gv-topics.htm