Real JPL Horizons ephemerides of Earth's confirmed temporary moons. Replay history, or flip to a
counterfactual: had a keeper been on standby, what would a burn have bought? Branch trajectories
are live RK4 integrations under real Sun + Moon perturbations. Dim path segments are
back-extrapolated (pre-discovery) — reconstruction, not observation.
Mission clock
4 d/s
Counterfactual branch
Camera focus · follows
—
—
rock—
distance—
speed rel. Earth—
orbital energy ε—
scenario Δv spent0 m/s
—
Faint amber ring: Earth's Hill sphere ≈ 3.9 LD — outside it the Sun's tide outvotes Earth's grip.
Ephemeris: JPL Horizons. Propagator: adaptive RK4, Earth+Sun+Moon.