\begin{table}%t4
%\centering
\par
\caption{Ephemeris of \object{PSR~J1012+5307} from the Effelsberg and the Lovell  radio timing data.  Errors on the last digits are shown in parenthesis after the values.}
\label{tab:1012parameters}
\begin{tabular}{ll}
\hline
\hline
Parameter & Value \\
\hline
Right ascension (J2000) & 10$^{\rm h}$12$^{\rm m}$33$\fs$43463677 \\
Declination (J2000) & 53$^{\circ}$07$^{'}$02$\farcs$4965199 \\
Period ($P$)  & 0.00525605523 s \\
Period derivative ($\dot{P}$) & $0.726912 \times 10^{-20}$ s s$^{-1}$\\
Second period derivative  ({\it \"{P}}) & $2.48928 \times 10^{-30}$ s s$^{-2}$\\
Frequency ($\nu$) & 190.267837551251880(508) Hz \\
Frequency derivative ($\dot{\nu}$) & $-6.200023(202)\times 10^{-16}$ Hz s$^{-1}$\\
Second frequency derivative (\"{\hspace*{-0.15cm}$\nu$})  & $1.871(294) \times 10^{-27}$~Hz~s$^{-2}$\\
Epoch of the period (MJD) & 52~018.324635450415 \\
Orbital period & 52~243.7224464(17) s \\
$a.\sin~ i$ & 0.581817416(121) \\
Eccentricity &  $<$$1.3 \times 10^{-6}$ \\
Time of ascending node (MJD) & 52~018.268144542(23) \\
\hline
\end{tabular}
\end{table}