\begin{table}%t5 \caption{\label{lbv_nebulae}Summary of the total mass and nebular expansion velocity of LBV (top panel) and YHG (bottom panel) circumstellar ejecta.} \small%\centerline { \begin{tabular}{lccl} \hline \hline Star & $v_{\rm neb}$ & $M$ & Reference\\ & (km~s$^{-1}$)& ($M_{\odot}$) \\ \hline $\eta$ Car (Homunculus) & 650 &$>$12 &a \\ \hspace{0.7cm} (Little Homunculus) & 200 & 0.1 & b\\ P Cygni & 136 & 0.1 & c\\ Pistol Star & 60--95 & 11 & d, e \\ AFGL 2298 & 70 & 10 & f \\ AG Car & 70 & 8.9 & g, h\\ G79.29+0.46 & 44 & 15 & i, j, k\\ Wra 751 & 26 & 1.7 & g, l \\ HD 168625 & 19 & 2.1 & m, n\\ \hline IRC +10 420 & 27 & 0.24 & o \\ & 35 & 0.46 & o \\ HD 179821 & 35 & 4.0 & o \\ \hline \end{tabular}} \medskip $^a$ Smith et~al. (\cite{smith03}); $^b$~Smith (\cite{smith05}); $^c$~Smith \& Hartigan (\cite{smith06b}); $^d$~Figer et~al. (\cite{figer99}); $^e$~Figer et~al. (\cite{figer98}); $^f$~Ueta et~al. (\cite{ueta}); $^g$~Voors et~al. (\cite{voors}); $^h$~Smith et~al. (\cite{smith91}); $^i$~Higgs et~al. (\cite{higgs}); $^j$~Waters et~al. (\cite{waters}); $^k$~Voors et~al. (\cite{voorsb}); $^l$~Hutsemekers \& \mbox{van Drom} (\cite{hut91}); $^m$~Pasquali et~al. (\cite{anna}); $^n$~\mbox{O'Hara} et~al. (\cite{ohara}); $^o$~\mbox{Castro-Carrizo} et~al. (\cite{castro}). \end{table}