Yarnball — Interplanetary Trajectory Planner for Kitten Space Agency

From To

Departures from for d

Flight time to d

Colour by

Brightest is cheapest; white circle is the minimum. Click to plot a transfer.

From To

Launch from to

Arrive by Flybys up to

Sequence

Optional: the planets to fly past, e.g. VVEJ or EVVEJS (M is Mars; write Me for Mercury). Gives the best route in each launch window.

At target Grid d

Cost of flight time m/s per year

Search: flyby-only model (Lambert legs, powered flybys, launch from a 200 km parking orbit); lists the best route per sequence within 15% of the best. Each route is then refined in turn, best first, by seeded SADE on the deep-space-burn model (pykep's MGA-1DSM: unpowered flybys, one burn per leg), one independent island per worker; the list re-sorts by Δv as each finishes. * = stopped early.

Drag to pan, scroll to zoom, double-click to reset. Click a planet for its orbit.