cruithne
Strideo
"
The
near
-Earth asteroid 3753 Cruithne
is
now
known
to
be
a
companion
,
and
an
unusual
one
,
of
the
Earth
.
This
asteroid shares
the
Earth's
orbit
,
its
motion
"choreographed"
in
such
a
way
as
to
remain
stable
and
avoid
colliding
with
our
planet
.
This
relationship
was
revealed
in
a
paper
by
Paul
Wiegert,
Kim
Innanen
and
Seppo Mikkola,
and
published
in
the
British
-based
science
journal
Nature
on
June
12
,
1997
.
A
brief
non-technical
description
of
the
motion
of
Cruithne
is
presented
below
.
However
, Cruithne's
path
is
much
more
complicated
than
simple
satellite
motion
; pondering
the
diagrams
carefully
should
help
clarify
matters
.
Note
:
small
images
have
been
used
to
ensure
fast
downloading;
click
on
any
figure
for
a
larger
, clearer
image
."
.
021217
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