We present multi-epoch observations with the VLBA of SiO maser emission in the v = 1 , J = 1 - 0 transition at 43 GHz from the remnant of the red nova V838 Mon .
We model the positions of maser spots to derive a parallax of 0.166 \pm 0.060 mas .
Combining this parallax with other distance information results in a distance of 5.6 \pm 0.5 kpc , which agrees with an independent geometric distance of 6.1 \pm 0.6 kpc from modeling polarimetry images of V838 Mon ’ s light echo .
Combining these results , and including a weakly constraining Gaia DR2 parallax , yields a best estimate of distance of 5.9 \pm 0.4 kpc .
The maser spots are located close to the peaks of continuum at \sim 225 GHz and SiO J =5–4 thermal emission detected with ALMA .
The proper motion of V838 Mon confirms its membership in a small open cluster in the Outer spiral arm of the Milky Way .