A rare multiple open cluster system has been analyzed using Gaia DR3 astrometry and photometry data. Using Agglomerative Hierarchical clustering and Bayesian-HDBSCAN, we identify a compact core consisting of seven known open clusters and two additional components, including a new candidate, forming a nine-member association. Membership probabilities are refined through statistical modeling, combining GUMM, Bayesian-KDE, and Bayesian-XDGMM for tidal tails identification. Backward orbital integrations confirm coherent motions over 20-30 million years, suggesting a common origin from the same massive molecular cloud. This system offers a unique laboratory for investigating cluster multiplicity, dynamical evolution, and Galactic structure.
@article{arxiv.2604.23093,
title = {Analysis of a Septuple Open Cluster System and Its Extended Family in Gaia DR3},
author = {Muhammad Akmal Husain and Ferdinand and Mochamad Ikbal Arifyanto and Muhammad Irfan Hakim},
journal= {arXiv preprint arXiv:2604.23093},
year = {2026}
}