First Parallax Measurements Towards a 6.7 GHz Methanol Maser with the
  Australian Long Baseline Array - Distance to G339.884-1.259
  We have conducted the first parallax and proper motion measurements of 6.7
GHz methanol maser emission using the Australian Long Baseline Array (LBA). The
parallax of G339.884$-$1.259 measured from five epochs of observations is
0.48$\pm $0.08 mas, corresponding to a distance of $2.1^{+0.4}_{-0.3}$ kpc,
placing it in the Scutum spiral arm. This is consistent (within the combined
uncertainty) with the kinematic distance estimate for this source at 2.5$\pm
$0.5 kpc using the latest Solar and Galactic rotation parameters. We find from
the Lyman continuum photon flux that the embedded core of the young star is of
spectral type B1, demonstrating that luminous 6.7 GHz methanol masers can be
associated with high-mass stars towards the lower end of the mass range.
