Discovered objects (black) scattered over a heat map of the selected literature population in each pair of {a, e, i, H}. Plots on the diagonal show the marginal cumulative distribution functions across each dimension. Visually, the populations appear to be in agreement, though the dearth of discovered objects around a ∼ 17, H ∼ 10.5, and of objects with both low a and low H are each noteworthy.