Tidal drag spindown time

I'm looking for a formula that can tell me the spindown time for rotating
planets subject to a single perturbing body.

For example, an equation telling me how much time would be needed to reduce
the frequency of rotation by 1/e, or 1/2, would be nice.

Does anybody know of one? It will be helpful in detailing the physical
characteristics of stars that can have a habitable planet or a binary planet
of which both components are habitable.

Jerry Abbott

"Jerry Abbott" wrote in message
...
I'm looking for a formula that can tell me the spindown time for rotating
planets subject to a single perturbing body.

For example, an equation telling me how much time would be needed to
reduce
the frequency of rotation by 1/e, or 1/2, would be nice.

Does anybody know of one? It will be helpful in detailing the physical
characteristics of stars that can have a habitable planet or a binary
planet
of which both components are habitable.

Probably not. First of all, we can BARELY can tell if there's planets.
And we can only calculate mass of stars etc. to certain extent. Then you
have to include other influences such as photons, magnetism, molecules,
meteor, other planets etc. as well as drag and thermo effect if rotation is
slow...
Then material planets are made of, things like liquid like earth must affect
this.

But you can look at our solar system, to know that everything will likely to
be spinning.

It seems there's other factor making calculation too...


http://www.aas.org/publications/baas.../dps98/320.htm


Jerry Abbott

"Jerry Abbott" wrote in message
...
I'm looking for a formula that can tell me the spindown time for rotating
planets subject to a single perturbing body.

For example, an equation telling me how much time would be needed to
reduce
the frequency of rotation by 1/e, or 1/2, would be nice.

Does anybody know of one? It will be helpful in detailing the physical
characteristics of stars that can have a habitable planet or a binary
planet
of which both components are habitable.

Probably not. First of all, we can BARELY can tell if there's planets.
And we can only calculate mass of stars etc. to certain extent. Then you
have to include other influences such as photons, magnetism, molecules,
meteor, other planets etc. as well as drag and thermo effect if rotation is
slow...
Then material planets are made of, things like liquid like earth must affect
this.

But you can look at our solar system, to know that everything will likely to
be spinning.

It seems there's other factor making calculation too...


http://www.aas.org/publications/baas.../dps98/320.htm


Jerry Abbott