\begin{table}%t3 \caption{\label{other_periods}Other determinations of the rotation period~$P$ of~\mbox{SW3-C}.} \small%\centerline { \begin{tabular}{llll} \hline\hline Mid time (UT) & $P$ [h] & Method & Reference \\\\ \hline May ~~~2, 2000 &~~~~2.8 & $R$-band photometry of the inner coma & \citet{Farnham01}, \\ &~~~~3.2 & & Farnham (priv. comm.)$^a$\\ &~~~~5.1 & & \\ April ~~3, 2006 &${\ge}3.8$ & $R$-band photometry of the inner coma & Waniak (priv. comm.)$^b$\\ April 10, 2006 &~~~~3.2 $\pm$ 0.2 & HST bare-nucleus equivalent photometry & \citet{Toth06}, \\ & & & Toth et~al. (priv. comm.)$^c$\\ May ~~~7, 2006 &~~~~8.8 $\pm$ 0.3 & Dust and CN coma morphology & \citet{Storm06} \\ &~~13.2 $\pm$ 0.3 & & \\ &~~27.2 $\pm$ 0.3 & & \\ May ~12, 2006 &${>}7$ & Doppler broadening of radar signal & \citet{Nolan06}, \\ & & & Nolan et~al. (priv. comm.)\\ \hline \end{tabular}} \medskip $^a$ Single-peak solutions, amplitude of 0.3~mag, aperture radius of~3\arcsec; $^b$~amplitude of 0.03~mag, aperture radius of~6\arcsec; $^c$~double-peak solution, amplitude of~0.6~mag. \vspace*{5mm} \end{table}