Fitting equation inside a column

Question

I am using twocolumn revtex mode, and for my matrix to fit inside the column I used this 'trick'

\begin{equation}
\resizebox{1.\hsize}{!}{
\bordermatrix{~ & \tau & r & \theta & \varphi \cr
              & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) &\cr
              & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & \cr
              & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) \cr
              & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) & h_{\tau\tau}=\bigo(r^2) \cr}}
\end{equation}

Which is fine, since this fits my matrix inside the column, but I don't like what it does to the numbering:

Is there a way to have one line of space between the matrix and the numbering? Or do I need to load some dreaded code inside for it to work? I looked at some examples here, but I would like a minimal code adjustment (like \resizebox for example)...