Re: Moon Tides

[Bernard Cleyet <georgeann@REDSHIFT.COM>]

I understand that this "solid" tide's energy absorption  is great enuff, so
that the resulting moon's recession (from the earth) will result in no total
eclispes soon.

bc


Pete Lohstreter wrote:

> > 3. Tides on the Moon
> > The  attraction of the Earth raises solid-body tides on the Moon. The
> > Moon keeps
> > one face toward the Earth, but there are still time-varying tides due to
> > 0.1 radian
> > variations in the apparent direction of the Earth (both latitude and
> > longitude) and
> > variation in the distance. The time-varying radial tidal displacement is
> > about 0.1 m,
> > Each of the three causes has a 0.1 m maximum effect at a different
> > location on the Moon.
> > The two dominant periods are 27,55 d (period of mean anomaly) and 27.21 d
> > (period of
> > node crossings). This is large enough to affect the Lunar Laser Ranging
> > data and is accounted for in the analysis, but it is less of a concern
> > for altimetry.
> LUNAR MOMENTS, TIDES, ORIENTATION, AND COORI)lNATE FRAMES
> James G. Williams, X X Ncwhall, and Jean O. Dickey
> Jet Propulsion Laboratory, California Institule of Technology, Pasadena,
> CA,911 09, USA
> jgw@logos.jpl.nasa. gov
>
> Pete Lohstreter                       Happy is he who gets to know the
> reasons for things.
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