FLY

Flyby Simulator

Hyperbolic gravity-assist trajectory planner

Mission Setup

Configure the central body and flyby parameters to compute a hyperbolic gravity-assist trajectory.

Interplanetary Mode Solar-system gravity assists. Typical v∞ of 5–20 km/s around planets like Jupiter or Earth. Periapsis measured as atmospheric altitude above the body's surface.

Central Body


Flyby Parameters

Relative speed far from body · typical: 5–20 km/s
Closest approach above the body's surface

Planet Motion

Speed of the body in its own orbit

Overlays

Hyperbolic trajectory
Body velocity
Optimal direction
Periapsis
Planar hyperbolic flyby · Keplerian gravity model · RK4 integration

Flyby Results

Gravity Assist

Δv Gain
km/s
|v in|
km/s
|v out|
km/s
Max Δv
km/s
Optimal Body Direction
degrees CCW from +x

Orbital Geometry

Awaiting input…