Re: Does the Ecliptic Pole move?

Yes, the ecliptic pole moves.

The ecliptic pole is actually a way to refer to the orientation of Earth's path around the Sun, called Earth's orbit. If things were very simple, Earth's orbit would always be in the same plane and the direction perpendicular to that plane, sometimes called the orbit normal, is, in this case, called the eliptic pole.

see also http://www.physics.ncsu.edu/courses/astron/orbits.html

http://www2.jpl.nasa.gov/basics/bsf3-1.html

In reality, things aren't simple, so Earth's orbit isn't always in the same plane, so the eliptic pole moves.

The things that complicate Earth's motion are the same things that complicate the motions of all the objects in our solar system, mostly Jupiter's gravity and the gravity of other planets and moons.

from http://www.gb.nrao.edu/~rfisher/Ephemerides/earth_rot.html

The ecliptic pole moves more slowly. If we imagine the motion of the two poles with respect to very distant objects, the earth's pole is moving about 20 arcseconds per year, and the ecliptic pole is moving about 0.5 arcseconds per year. The combined motion and its effect on the position of the vernal equinox are called general precession. The predictable short term deviations of the earth's axis from its long term precession are called nutation...

If you want detailed data on where the ecliptic pole points, see http://www.space-plasma.qmw.ac.uk/heliocoords/systems2art/node3.html and look for the following text...

The orientation of the ecliptic plane of date with respect to the the ecliptic plane at another date is defined by the inclination, the ascending node, longitude of the plane of date E relative to the plane of date F, and the difference in the angular distances of the vernal equinoxes from the ascending node. Values for J2000.0 are given

J2000.0 means, basically, January 1, 2000, 12:00 UTC, see http://www.wordiq.com/definition/Epoch_(astronomy) And, since it came up, UTC stands for Coordinated Universal Time, see http://www.wordiq.com/definition/UTC and http://aa.usno.navy.mil/faq/docs/UT.html

If you really want accurate data, try the HORIZONS system or get a copy of JPL's planetary ephemeris; although, you'll have do the analysis, yourself :)