Table 5: Stellar parameters of $\omega $ Ori obtained by fitting hydrogen and helium lines.
$T_{\rm eff}^\circ$ $20~020 \pm 700 $ K
log $g^\circ$ $3.53 \pm 0.07 $
i $ 42 \pm 7^{\circ}$
$v \sin~i$ $172 \pm 11$ km s-1


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