Parallaxes of 6.7-GHz Methanol Masers towards the G305.2 High-Mass Star
  Formation Region
  We have made measurements to determine the parallax and proper motion of the
three 6.7-GHz methanol masers G305.200$+$0.019, G305.202$+$0.208 and
G305.208$+$0.206. The combined parallax is found to be 0.25$\pm $0.05 mas,
corresponding to a distance of 4.1$^{+1.2}_{-0.7}$ kpc. This places the G305.2
star formation region in the Carina-Sagittarius spiral arm. The inclusion of
G305.2 increases the Galactic azimuth range of the sources in this arm by
40$^\circ $ from Sato et al., allowing us to determine the pitch angle of this
spiral with greater confidence to be $\psi = 19.0 \pm 2.6^\circ $. The first
VLBI spot maps of the 6.7-GHz methanol masers towards these sources show that
they have simple linear and ring-like structures, consistent with emission
expected from classII methanol masers in general.
