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We utilize the robust membership determination algorithm, ML-MOC, on theprecise astrometric and deep photometric data from Gaia Early Data Release 3within a region of radius 5$^{\circ}$ around the center of the intermediate-agegalactic open cluster NGC 752 to identify its member stars. We report thediscovery of the tidal tails of NGC 752, extending out to $\sim$35 pc on eitherside of its denser central region and following the cluster orbit. Fromcomparison with PARSEC stellar isochrones, we obtain the mass function of thecluster with a slope, $\chi=-1.26\pm0.07$. The high negative value of $\chi$ isindicative of a disintegrating cluster undergoing mass-segregation. $\chi$ ismore negative in the intra-tidal regions as compared to the outskirts of NGC752. We estimate a present day mass of the cluster, M$\rm_{C}=297\pm10$M$_{\odot}$. Through mass-loss due to stellar evolution and tidal interactions,we further estimate that NGC 752 has lost nearly 95.2-98.5 % of its initialmass, $\rm M_{i}~=~0.64~-2~\times~10^{4}~M_{\odot}$.

Tidal tails in the disintegrating open cluster NGC 752