We propose a follow-up wide and deep HSC photometry of tidal tails associated with a globular cluster NGC 5466 in the Milky Way outer halo. Under the accepted program S22A-113, we have successfully obtained a narrow-band NB395 photometry of the central and the north-western region of this cluster. Because of the low transparency (<0.3) during the previous run, we were unable to obtain corresponding g, and i-band data down to ∼ 3 magnitudes deeper than the main-sequence turn-off of this cluster as originally planed. We therefore, request to re-take g and i band data in this semester. With the wide-field capability on the 8m-class telescope, Subaru/HSC uniquely enable us to cover the region out to >2 times the tidal radius of this cluster, while going much deeper to detect lower main-sequence stars. We make use of the data to analyze the physical properties of the tidal streams, most importantly, the shape (length, width) and the orientation of the tidal stream, as well as the stellar mass function with high statistical significance. The obtained detailed morphology and the stellar mass function of this cluster allows us to constrain the dynamical evolution and the tidal stream formation in this cluster in unprecedented detail.
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