The thickness of the track ballast usually ranges between 25-30 cm and varies depending on certain conditions pertaining to the geographical location of the railway track.
And if we look at the Sun-Earth system from afar we find that the Earth's axis maintains the same orientation regardless of its position in its orbit around the Sun.
An annular eclipse is a solar eclipse that occurs when the Earth's orbit brings it relatively close to the sun at the same time that the moon's orbit takes it relatively far from the Earth.
As asteroids on either side of this band orbit the sun, they pass Jupiter and get a little extra gravitational pull, but that pull comes at a different place with each orbit, so it kind of just averages out over time.