Fig. A.2
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Positions of VLA 1623B and VLA 1623W extrapolated in time based on their proper motion. Arrows show the relative proper motions of both YSOs as measured here (for W) and in Sadavoy et al. (2018) (for B). Solid circles show look back times for 5000 years in steps of 500 years. The closest approach (in the plane of the sky) is represented by open circles.
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