const ACTIVE_TIDAL_PROXY: number
Where eccentricity tides stop being a rounding error, dimensionless.
The proxy below puts Ganymede and Callisto at ~2.5e-7, Europa at 4.5e-6 and Enceladus at 2.9e-5 — an order of magnitude between the dead ones and the ones with plumes, which is what makes a single threshold usable at all.
universe/src/archetype.ts:52