Route estimate
Select a start and destination to calculate the instantaneous separation, straight-line visual trajectory, and travel time.
Advanced controls and source data
Artemis reference
The Moon travel-time reference uses the mean Earth-Moon distance divided by your selected number of days. It is an educational comparison, not a NASA trajectory or a spacecraft speed forecast.
Simulation controls
Object data
Model limits
Planet positions use JPL approximate Keplerian elements for the eight planets where available. Orbit drawing is 2D and compressed so the outer planets fit on screen. The route line is a simplified instantaneous chord, not a powered gravity-assist mission design.
- Planet diameters/distances: NASA/JPL Solar System Sizes and Distances.
- Mean orbital velocities: NASA Basics of Space Flight, Solar System chapter.
- Planet positions: JPL Solar System Dynamics approximate planetary elements.
- Moon, Pluto and Ceres facts: NASA Science.