Orbital uncertainty is the estimated error margin around a satellite’s predicted position. Tracking observations are incomplete and subject to measurement error, while an object’s orbit can change over time. As a result, analysts represent its future location as a range of possibilities rather than an exact point.
In cyber and space security, this uncertainty matters when operators assess a conjunction, or a predicted close approach between orbiting objects. They compare the possible separation and its uncertainty to judge collision risk and whether more tracking or an avoidance maneuver is needed. Uncertainty can limit what public data proves: a close-pass estimate alone does not establish hostile intent or an actual threat. Defenders therefore rely on updated observations, communicate uncertainty clearly, and avoid treating a prediction as a confirmed outcome.