Table 6: Results from our VLBA observations of the v=1, 43.1  GHz and v=2, 42.8 GHz SiO maser transition toward S Ori.
Epoch A B C
Phase $\Phi_{\rm vis}$ 0.46 0.56 1.14
$\bar{r}_{v=1}$ [mas] 9.9 $\pm$ 1.4 9.6 $\pm$ 1.1 10.2 $\pm$ 1.2
$\bar{r}_{v=2}$ [mas] 8.6 $\pm$ 1.0 9.1 $\pm$ 1.1 8.9 $\pm$ 0.9
$\bar{r}_{v=1}$/ $\bar{r}_{v=2}$ 1.15 1.05 1.15
$\bar{V}_{v=1}$ [km s-1] 12.6 $\pm$ 2.4 13.3 $\pm$ 2.5 13.0 $\pm$ 2.8
$\bar{V}_{v=2}$ [km s-1] 12.5 $\pm$ 2.4 12.9 $\pm$ 3.2 12.5 $\pm$ 2.9
$\bar{V}_{v=1}$/ $\bar{V}_{v=2}$ 1.01 1.03 1.04


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