  Binaries play a critical role in the formation, evolution, and fundamental
properties of planets, stars, and stellar associations. Observational studies
in these areas often include a mix of observations aimed at detecting or ruling
out the presence of stellar companions. Rarely can non-detections rule out all
possible binary configurations. Here we present MOLUSC, our framework for
constraining the range of properties of unseen companions using astrometric,
imaging, and velocity information. We showcase the use of MOLUSC on a number of
systems, ruling out stellar false positives in the signals of HIP67522b, and DS
Tuc Ab. We also demonstrate how MOLUSC could be used to predict the number of
missing companions in a stellar sample using the ZEIT sample of young planet
hosts. Although our results are not significant, with a larger sample MOLUSC
could be used to see if close-in planets are less common in young binary
systems, as is seen for their older counterparts.
