Re: Will we get a meteor shower from McNaught?

richard@xxxxxxxxxxxxxxx (Richard Tobin) wrote in
news:ep8qe5$1a73$1@xxxxxxxxxxxxxxxxxxxxxxx:

In article <Xns98C37A7806092Klazmonllurdiaxorbgo@xxxxxxxxxxx>,
Llanzlan Klazmon the 15th <Klazmon@xxxxxxxxxxxxxxxx> wrote:

I was told that extremely long period comets always have hyperbolic
orbital elements when they are close to the Sun, as the Sun alone does
not have sufficient mass to keep them bound but the solar system as a
whole does.

I think this must be conjecture. The sun accounts for almost all the
known mass of the solar system. It's possible that the Oort Cloud
contains an appreciable fraction of the sun's mass, but this is not
certain.

Jupiter is around 0.1 percent. We are talking objects with periods of more
than a million years. A very small change in perihelion speed at less than
one au makes a big change in 1/a.

Klazmon.





-- Richard


.

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