Cluster aggregates surrounding Pismis 5 in the Vela molecular ridge

Context. In the Gaia era, precision of astrometric data is unprecedented. High-quality make it easier to find more cluster aggregates and gather further confirmation these open clusters. Aims. We use Data Release 3 (DR3) redetermine clusters surrounding Pismis 5 in Vela molecular ridge (VMR). also investigate basic properties Methods. applied two clustering algorithms (S TAR GO pyUPMASK) identify open-cluster members five-dimensional space with α , δ ϖ μ cos . Results. eight VMR. The QZ 1 newly discovered. As a result our investigation comprehensive clusters, we present one binary candidate (Alessi 43 Collinder 197) triple (Pismis 5, A B ). Conclusions. candidates as potential primordial based on their similar age, position, motion. According kinematic speculations, aggregate will gradually separate, interiors slowly disintegrate.