  The classical Cepheid KQ Sco is a valuable anchor for the distance scale
because of its long pulsation period ($28^{\rm d}.7$) and evidence implying
membership in the open cluster UBC 1558. Analyses tied to Gaia DR3 astrometry,
photometry, spectroscopy, radial velocities, and 2MASS-VVV photometry indicate
a common distance of $2.15\pm0.15$ kpc (L21 DR3 corrections applied).
Additional cluster Cepheid candidates requiring follow-up are identified, and
it's suggested that a team of international researchers could maintain a
cluster Cepheid database to guide the broader community to cases where
consensus exists.
