\begin{table}%t5
\caption{\label{knownfragile}Multiple systems in the solar neighbourhood with at least one low-mass component ($\mathcal{M} <  0.15~M_\odot$) and the lowest  binding energies for their total masses.} 
%\centerline
 {\small\begin{tabular}{lll cccc l}
 \hline \hline
WDS  & Primary	& Secondary & $s$ & $\mathcal{M}_1$ & $\mathcal{M}_2$ & $U_g^*$  & Discovery	\\[1.5mm]
identifier & & & [10$^3$~AU]  & [$M_\odot$] & [$M_\odot$]	& [10$^{33}$~J]& reference \\
 \hline
00212--4246$^{a}$ & K\"o~1~A & K\"o~1~B	& 1.8 & 0.103  	& 0.079		& --8.0		& Caballero (\cite{Ca07a}a) \\ % 
01269--5023		& 2M0126--50~A	& 2M0126--50~B	& 5.1		& 0.095  	& 0.092		& --3.0		& Artigau et~al. (\cite{Ar07}) \\  
12076--3933		& 2M1207--39~A	& 2M1207--39~B	& 0.046		& 0.025  	& 0.005		& --4.8		& Chauvin et~al. (\cite{Ch04}) \\  
...$^{b}$		& 2M1258+40~A	& 2M1258+40~B	& 6.7		& 0.105  	& 0.091		& --2.5		& Radigan et~al. (\cite{Ra09}) \\  
15232+3017$^{c}$	& $\eta$~CrB~AB	& $\eta$~CrB~C	&  3.6		& 2.000  	& 0.060		& --59		& Kirkpatrick et~al. (\cite{Ki01}) \\ % 
23315--0405$^{d}$	& K\"o~3~A	& K\"o~3~BC	& 11.9		& 1.02  	& 0.160		& --24		& Caballero \cite{Ca07b}b) \\  
...			& Sun		& Uranus	& 0.019191	& 1.000  	&$4.367\times 10^{-5}$& --4.0	& Herschel 1783$^{e}$ \\  
...			& Sun		& Neptune	& 0.030069	& 1.000  	& $5.151\times 10^{-5}$& --3.0	& Le Verrier (\cite{LV1847})$^{f}$ \\ \hline
         \end{tabular}}
\medskip
$^{a}$ The (abridged) names of the components in the Koenigstuhl~1 
system are \object{LEHPM~494} (K\"o~1~A) and DE0021--42 (K\"o~1~B);
 $^{b}$~the system 2M1258+40~AB awaits a WDS numbering; $^{c}$ Kirkpatrick et~al. (\cite{Ki01}) used the name ``Gl~584C'' for the brown  dwarf companion $\eta$~CrB~C.  The primary $\eta$~CrB~AB is a spectroscopic binary with individual masses~1.003  and 0.997~$M_\odot$; $^{d}$ the (abridged) names of the components in the Koenigstuhl~3  system are \object{HD~221356} (K\"o~3~A) and 2M2331--04~AB (K\"o~3~BC). The secondary is, in its turn, an M8.0V~+~L3.0V close binary with individual masses 0.088 and 0.072~$M_\odot$ (Gizis et~al. \cite{Gi00}, \cite{Gi03}; Caballero \cite{Ca07b}b); $^{e}$~actually, Uranus was pointed out by William Herschel in 
March~1781; $^{f}$~there is a consensus that Urbain Le~Verrier, John Couch Adams,  and Johann Galle jointly deserve credit for discovering Neptune. 
   \end{table}