Rendezvous with Rama

Peter Lynch wrote

The yanks' current stealth technology is probably good enough
to hide a small satellite in L.E.O.

AIUI there have been attempts at stealth LEO satellites, only partially
successful as a number of them have been tracked by "amateur" satellite
watchers.

If the craft came in fast and from above/below the plane of the
ecliptic (i.e. where no-one's looking) then I would expect it could
get pretty close, say to within the moon's orbit.
Maybe they're here already :-)

They've already landed and infiltrated most of the world's governments
and corporations. :-)

--
Hil