Cumulative size distribution of each SSO population for current census (solid lines) and synthetic populations (average estimates represented by the dashed lines, upper and lower estimate not plotted for clarity). The number of known objects that is observable at the limiting apparent magnitude of Euclid over the entire celestial sphere is represented by the dot-dashed lines. The open squares and circles represent the 0, 25, 50, 75, and 100% marks of the (H−V) cumulative probability function at the saturation and photon-starving ends. The total number of objects expected on the sky is marked by the filled circles. The difference between these filled circles and the current census represents the margin for discovery.
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