Distribution of the additional proper motion components in right ascension (Δμ_α^*) and declination (Δμ_δ) caused by secular aberration drift due to the change in the line of sight for Galactic stars with a total proper motion exceeding 1 mas yr⁻¹. (a) Scatter plot of Δμ_α^* versus Δμ_δ. The ten sources with the greatest additional proper motion are highlighted, with their names labeled near the data points. (b) Histogram of Δμ_α^*. (c) Histogram of Δμ_δ.