Vector point diagram showing the proper motion displacements in x and y for all stars common to the HST datasets from proposals 10775 and 16298 (gray points). The red dot marks the position and uncertainty of the object at the M3E radio position. The 1σ, 2σ, and 3σ contours, representing the modeled cluster PM distribution, are shown for reference. The distribution was modeled with a two-dimensional Gaussian mixture model (GMM) using a single component, implemented via the XDGMM Python framework (Holoien et al. 2017).