Comparing the luminosity, size, and metallicity of Specter to known streams and intact structures. Left: stream widths (Gaussian σ) and luminosities for several dwarf and GC streams from Shipp et al. (2018). We overlay intact (gravitationally bound) dwarfs and GCs, using the half-light radius as a proxy for characteristic size (McConnachie 2012; Baumgardt et al. 2020; Vasiliev & Baumgardt 2021). Middle: luminosity–metallicity relation for Specter, alongside an updated sample of intact dwarfs from McConnachie (2012) and dwarf streams from Shipp et al. (2018). Right: mean metallicity and intrinsic metallicity spreads for streams from Ji et al. (2020). We overlay intact dwarfs and GCs compiled by Willman & Strader (2012), omitting error bars for clarity.