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\section{Methods & Results}  \subsection{Stellar Identification}  The R $= 22700$, high SNR spectra of USNO-A0600-15865535 showed it to have very strong H$\epsilon$ and H$\zeta$ at $\sim 0$ km/s in the local standard of rest (LSR) frame, and thus was very likely to be a halo star in the Milky Way, rather than the quasar we had originally attempted to target. Such stars are typically either blue horizontal branch (BHB) stars or blue stragglers (BS) stars, though can occasionally be hot main sequence (MS) stars.  To distinguish between these possibilities, we use a modification of the method developed by \citet{Sirko_2004} and later explored by \citet{Xue_2008}. In these works the shape of the H$\gamma$ and H$\delta$ lines are used to distinguish between these populations. These Balmer lines are fit with a standard Sersi\'c profile,