\documentstyle[twoside,epsf]{article}

\input ibvs2.sty
\input ibvst.sty

\begin{document}

\IBVShead{4608}{3 July 1998}

\IBVStitle{New observations and ephemeris of RT CM\lowercase{a}}

\IBVSauth{SEIICHIRO KIYOTA}

\IBVSinsto{Variable Star Observers League in Japan. 1-401-810 Azuma,
Tsukuba, 305-0031 Japan\\
e-mail: {\tt skiyota@abr.affrc.go.jp}
}

\begintext


\IBVSTnam{RT CMa}

\IBVSTcoo{06\hr 13\mm 11\fsec 4
}{$-$17\deg 39\arcm 16\arcs
}{2000.0
}

\IBVSTobs{0.25-m Schmidt Cassegrain (F/6.3)
}

\IBVSTdet{SBIG ST-6 CCD camera
}

\IBVSTfil{Johnson V
}

\IBVSTcomp{GSC 5937:1603
}

\IBVSTchk{GSC 5937:1505
}

\IBVSTsysn

\IBVSTtyp{ EA
}

\IBVSTrem{
I observed RT CMa during the period 1996--1998 and obtained the following
five new moments of minima. JDhel 2450093.9812, 2450115.9749,
2450403.1885, 2450463.9899, 2450830.1223. I linked these minima and
Kordylewski's observation (1963), yielding the following refined
ephemeris.
\begin{center}
Min I\,JDhel = 245 0093.9844(3) + 1.2937348(3) $\times$ E.
\end{center}
}

\IBVSTack{
I thank Dr.\ Taichi Kato, Kyoto University for useful discussion and advice.
}

\vfil\eject

\IBVSfig{10cm}{4608-f1.ps}

\references
Florya, N., 1937, {\it Publication of the Sternberg State Institute}, Moscow,
{\bf 8}, 2

Kholopov, P.N. et al., 1985, {\it General Catalog of Variable Star}, Moscow.

Kordylewski, K., 1963, {\it IBVS}, No.\,35

\end{document}
