\begin{table}%t2
     %\centering
\par
  \caption{Geometrical (obtained from the minimum variance method) 
  and physical parameters (fitted with a least-square method)
  for the small~MC. L, G, and H refer to Lundquist, Gold 
  and Hoyle, and Hidalgo et~al. model, respectively.  
   The geometrical parameters are:
  the angle~$\theta$ between the axis of the tube and the ecliptic 
  plane, the angle~$\varphi$ between the projection of the axis on the
  ecliptic plane and the abscissa of GSE (anti-clockwise as seen from
  the positive $z_{\rm GSE}$ axis), and the flux tube radius~($R$).
  The two physical parameters are: 
  the twist per unit length~($\tau _0$) and
  the intensity of the field ($B_0$), both at the flux tube centre.
 In the last three columns, 
we give the computed magnetic flux in the $B_z$ component 
 ($F_z$), in the $B_{\phi}$ component per unit length 
 ($F_{\phi}/L$) and the magnetic helicity per unit length 
  ($H_{\rm cloud}/L$).\label{Table-MC}}
       \begin{tabular}{lcccccccc}  
       \hline\hline
  Model & $\theta$ & $\varphi$ & $R$ 
  & $\tau _0$ & $B_0$ & $F_z$ & $F_{\phi}/L$ 
  &$H_{\rm cloud}/L$ \\
  & $^\circ$ & $^\circ$ & 10$^{-2}$~AU & AU$^{-1}$ & nT & 
  $10^{19}$~Mx & $10^{19}$~Mx/AU & 10$^{39}$~Mx$^2$/AU\\
  \hline
  L & 59 & 172 & 1.6 & --66 & 13.8 & 1.3 & 20. & --3.0\\
  G & 59 & 172 & 1.6 & --85 & 14.1 & 1.4 & 19. & --2.8\\
  H & 59 & 172 & 1.6 & --51 & 15.9 & 0.9 & 23. & --3.0\\
  \hline
  \end{tabular}
  \end{table}