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We present new spatial models and distance estimates for globular clusters(GC) and dwarf spheroidals (dSphs) orbiting our Galaxy based on RR Lyrae (RRab)stars in the Pan-STARRS1 (PS1) 3$\pi$ survey. Using the PS1 sample of RRabstars from Sesar et al. (2017) in 16 globular clusters and 5 dwarf galaxies, wefit structural models in $(l,b,D)$ space; for 13 globular clusters and 6 dwarfgalaxies, we give only their mean heliocentric distance $D$. We verify theaccuracy of the period-luminosity (PL) relations used in Sesar et al. (2017) toconstrain the distance to those stars, and compare them toperiod-luminosity-metallicity (PLZ) relations using metallicities from Carrettaet al. (2009). We compare our Sesar et al. (2017) distances to theparallax-based \textit{Gaia} DR2 distance estimates from Bailer-Jones et al.(2018), and find our distances to be consistent and considerably more precise.

Precision distances to dwarf galaxies and globular clusters from Pan-STARRS1 3$\pi$ RR Lyrae