Sorry Paul, the moon is a slightly different animal than most satellites. The mass of the Moon is not insignificant compared to the mass of the Earth. So the calculation turns out to be a bit different. I was trying to say that the mass doesn't matter when the mass of the orbiting body is much smaller than the mass of the main body.
And have you heard of a Trojan orbit? There are 2 groups of asteroids in the solar system that are called the Trojans, because they were named after heroes of the Trojan war. The thing that makes them unique is that they are in the same orbit as Saturn. One group is 60 degrees ahead of Saturn in its orbit and the other 8s 60 degrees behind.
Here is the Wikipedia article. The thing is of course that the Trojans are extremely less massive than Saturn, but they occupy the same orbit. So I'm afraid your contention is kind of shot down by the fact that there are many satellites that don't agree with your claim.
Bill Gill
