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Understanding the exact extent and content of tidal tails of open clustersprovide useful clues on how field stars populate the Milky Way. We reanalyse,using Gaia EDR3 data, the tails around the open cluster NGC 752. Compared toprevious analyses, we look at a much wider region around the cluster and usefirst the convergent point method, coupled with a clustering analysis usingDBSCAN. We find that the cluster, located 433 pc away and well described by aPlummer profile, has very long and asymmetric tails, extending more than 260 pcon the sky (from tip to tip) - four times larger than previously thought - andcontains twice as many stars. Numerical models computed with PETAR serve asguide and confirm our analysis. The tails follows the predictions from models,but the trailing tail appears slightly distorted, possibly indicating that thecluster had a complicated history of galactic encounters. Applying analternative method to the newly developed compact convergent method, wepotentially trace the cluster's tidal tails to their full extent, coveringseveral thousands of parsecs and more than 1,000 stars. Our analysis thereforeopens a new window on the study of open clusters, whose potential will be fullyunleashed with future Gaia data releases.

A tale of caution: the tails of NGC 752 are much longer than claimed