Source and lens trajectories for linear (top) and accelerated (bottom) approximations of orbital motion in binary sources. We present the unlensed sources (solid lines) and the lensed images (dashed + dotted lines). For each source, there is a major and a minor image. The minor image is seen around the lens, and the major image is seen around the source. The green line is the flux-weighted average of lensed source positions, as observed on the sky. Note that mag_S,pri = 16 and mag_S,sec = 17. In both panels, the primary’s proper source motion μ_S,⊙ is [6 mas yr⁻¹, 3 mas yr⁻¹]; the secondary’s proper source motion relative to the primary source ﹩{{\boldsymbol{\mu }}}_{{S}_{s},\odot }﹩ is [9 mas yr⁻¹, 7 mas yr⁻¹]. The acceleration of the secondary source a_Srel,⊙ is [0.5 mas yr⁻², −2 mas yr⁻²] in the lower panel. In both cases, the Einstein time t_E,⊙ = 269 days, the Einstein radius is 4.9 mas, and u_0,⊙ =1.01. The lens mass is 10M_⊙, and it is held stationary.