\begin{table}%t1
\caption{Timing model for PSR~J2145$-$0750.\label{tab:params}}
%\centerline
{\begin{tabular}{ll}
\hline\hline
\multicolumn{2}{c}{Measured parameters$^a$}\\
\hline
Ecliptic longitude, $\lambda$       & $326\fdg02465688(10)$\\
Ecliptic latitude, $\beta$         & $5\fdg3130779(8)$\\
Proper motion$^b$, $\mu_{\lambda}$ (mas~yr$^{-1}$)   & $-12.37(6)$ \\
Proper motion$^b$, $\mu_{\beta}$   (mas~yr$^{-1}$)   & $-6.8(7)$ \\
Right ascension$^c$, $\alpha$ (J2000) & $21^{\rm h} 45^{\rm m} 50~\fs46726$ \\
Declination$^c$, $\delta$ (J2000)     & $-07\degr 50\arcmin 18~\farcs 375$\\
Parallax, $\pi$ (mas)                     & $2.0(6)$ \\
Pulse frequency, $\nu$ (s$^{-1}$)          & $62.2958888453343(4)$\\
Pulse frequency derivative, $\dot\nu$ (10$^{-16}$ s$^{-2}$) & $-1.15481(8)$\\
Pulse period, $P$ (ms)                     & $16.05242365965367(14)$\\
Period derivative, $\dot P$ (10$^{-20}$ s~s$^{-1}$) & $2.9757(2)$\\
Epoch (MJD)                              & $50~800.0$ \\
Orbital period, $P_{\rm b}$ (d)          & $6.8389025099(4)$\\
Projected semi-major axis, $x$ (lt-s)    & $10.1641056(6)$    \\
First derivative of $x$, $\dot x$ (10$^{-14}$ lt-s~s$^{-1}$)& $1.8(6)$\\
$\epsilon_1$          & $-0.00000677(8)$      \\
$\epsilon_2$          & $-0.00001805(10)$      \\
Epoch of ascending node, $T_{\rm ASC}$ (MJD)   & $50~802.29811051(8)$\\
Eccentricity$^d$, $e$                    & $0.00001928(10)$      \\
Epoch of periastron$^d$, $T_{\rm 0}$ (MJD)      & $50~806.108(4)$\\
Longitude of periastron$^c$, $\omega$ (deg)     & $200.5(2)$    \\
Dispersion measure, DM (pc~cm$^{-3}$) & $9.0031(2)$  \\
Dispersion measure derivative, d$({\rm DM})/{\rm d}t$ (10$^{-4}$ pc~cm$^{-3}$~yr$^{-1}$) & $-2.2(4)$  \\
\hline
\multicolumn{2}{c}{Measured upper limits$^e$}\\
\hline
Pulse frequency second derivative, $|\ddot\nu|$ (s$^{-3}$)& $<$$8\times 10^{-28}$\\
Orbital period derivative, $|\dot P_{\rm b}|$ (s~s$^{-1}$)& $<$$2.4\times 10^{-12}$ \\
Eccentricity derivative, $|\dot e|$ (s$^{-1}$)     & $<$$2.8\times 10^{-15}$   \\
Periastron rate of change, $|\dot\omega|$ (deg~yr$^{-1}$) & $<$$0.47$ \\ 
\hline
\multicolumn{2}{c}{Derived parameters}\\
\hline
Galactic longitude, $l$  & $47\fdg 78$\\
Galactic latitude, $b$ & $-42\fdg 08$\\
Parallax distance  (pc)& $500^{+210}_{-120}$  \\
Composite proper motion, $\mu$ (mas~yr$^{-1}$)   & 14.1(4)\\
Transverse velocity, $v_{\rm t}$ (km~s$^{-1}$)  &  33(9) \\
Mass function, $f_{\rm m}$ (\msun)     & $0.024105570(4)$\\
Pulsar characteristic age (Gyr) & 10.4(5)\\
Pulsar surface magnetic field ($10^8$ G) & 6.35(14)\\
Timing~RMS (\usec)           & 2.7        \\
\noalign{\smallskip}\hline
\end{tabular}}
\smallskip
{\small $^a$ Uncertainties quoted are in the last digit(s) and represent
  $2\sigma$ estimates (twice the formal {\sc tempo} errors).}\newline
{\small $^b$ Calculated from Monte-Carlo simulations.}\newline
{\small $^c$ Calculated from ecliptic coordinates.}\newline
{\small $^d$ Calculated from the ELL1 model.}\newline
{\small $^e$ Upper limits represent 95\% C.L.}\newline
\end{table}