Peak in the relative mass of the Öpik-Oort cloud (μ_ÖO) for the isolated Solar System. The black bullet points represent the measured maximum mass of the Öpik-Oort cloud, with 1 standard deviation uncertainty, measured at the time the maximum Öpik-Oort cloud mass is reached. The shaded areas show the uncertainty obtained from 27 calculations centered on the global mean with the error ellipse for 0.5 (darkest shade red), 1.0, and 2.0 (lightest shade) standard deviations. A least-squares fit of a linear function to the data does not give a significant result. The geometric mean of the 27 bullet points is at a mass of m_dm = 0.027 ± 0.006, at an age of 226 ± 24 Myr.