Median Statistics Estimate of the Galactic Rotational Velocity
  We compile a complete collection of 19 recent (since 2000) measurements of
$\Theta_0$, the rotational velocity of the Milky Way at $R_0$ (the radial
distance of the Sun from the Galactic center). These measurements use tracers
that are believed to more accurately reflect the systematic rotation of the
Milky Way. Unlike other recent compilations of $\Theta_0$, our collection
includes only independent measurements. We find that these 19 measurements are
distributed in a mildly non-Gaussian fashion and a median statistics estimate
indicates $\Theta_0 = 220\ \pm 10$ km\,s$^{-1}$ (2$\sigma$ error) as the most
reliable summary, at $R_0 = 8.0 \pm 0.3$ kpc (2$\sigma$ error).
