Rotating Saddle Trap vs Celestial Gravity

Scientific review of the time-varying quadrupole gravitational potential demonstration and its relation (or lack thereof) to orbital mechanics

Mechanical Analog — Rotating Hyperbolic Paraboloid STABLE
x′ (attractive) y′ (repulsive) Trapped ball (rigid body)
Lab frame view • rotation applied to potential

Stability Diagram (Mathieu-like)

Shaded region indicates parametric stability windows. Vertical line = current Ω / Ωnat.