NGC 1605 is an old binary open cluster, study finds

By analyzing the data from 2MASS and Gaia-EDR3 surveys, as well as images from NASA’s WISE spacecraft, a Brazilian astronomer has inspected a galactic open cluster (OC) known as NGC 1605. The study, presented in a paper published September 29 on arXiv.org, reveals that NGC 1605 is not a single open cluster as was previously thought but a pair of OCs.