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\IBVShead{4508}{14 August 1997} 
 
\IBVStitle{A NEW POSITION AND PERIOD FOR CY DRACONIS} 
 
\IBVSauth{JESSICA E.\ SAWYER$^1$, PRISCILLA  J.\ BENSON$^2$} 
 
\IBVSinst{Vassar College, Poughkeepsie, New York, 12604, USA 
[e-mail: jesawyer@vassar.edu]} 
 
\IBVSinst{Wellesley College, Wellesley, Massachusetts, 
02181, USA [e-mail: pbenson@wellesley.edu]} 

\IBVSabs{More precise values for the position and period of CY Dra}
\IBVSabs{are reported.}

\SIMBADobj{CY Dra}
\IBVStyp{ RRab }
\IBVSkey{photometry, CCD}
 
\begintext 
 
CY Draconis is a suspected RR Lyrae star that is listed without a 
period in the {\it General Catalog of Variable Stars} (GCVS).  We 
found no reference to CY Draconis in the Simbad database.  We observed 
CY Draconis from 01 July 1997 to 30 July 1997 on the 24-inch telescope 
at Wellesley College.  A few images were taken each night in each of 
the I, R, and V filters.  The first part of the summer a PM512 CCD 
camera was used, but this was upgraded on 23 July 1997 to a Tektronics 
CCD with a 1024$\times$1024 chip.  We did photometry on CY Draconis and 
several comparison stars in the field using IRAF.  The differences in 
the magnitudes of the comparison stars and CY Draconis were plotted in 
a spreadsheet.  We made a phase diagram to try to determine the period 
of the star and found it to be about 0.53515 days.  The V filter 
amplitude is about 0.7 magnitudes.  The data we collected confirms 
that CY Draconis is an RR Lyrae star and seems to place it in the RRab 
group.  We illustrate the V folded light curve in Figure 1. 
 
\vskip 8mm 
 
\IBVSfig{7cm}{4508-f1.eps}{The V folded light curve for CY Draconis assuming a period of 0.53515 days} 
 
\vskip 8mm 
 
While studying this star, we found that the coordinates given under 
the GCVS's listing of CY Draconis are off by almost one arc minute. 
Using the {\sl Guide Star Catalog}, we determined more precise 
coordinates for CY Draconis are $\alpha_{2000} = 19\hr 46\mm 
06\sec$, \hbox{$\delta_{2000} = 59\deg 34'29''$.}  Figure 2 gives a 
finder chart of CY Draconis identifying the comparison star we used.  

\IBVSfig{7cm}{4508-f2.eps}{Finder chart for CY Draconis identifying the comparison 
star used.  North is up.  The field of view is approximately 7.5 arcminutes square.} 
 
\vskip 8mm 
 
We thank the W. M. Keck Foundation for a summer internship (JES) and 
support of astronomy at Wellesley and Vassar Colleges through the Keck 
Northeast Astronomy Consortium.  This research was also partially 
supported by funds from the National Science Foundation (AST9417359) 
(PJB).  This research has made use of the Simbad database operated at 
CDS, Strasbourg, France. 
 
\vskip 1cm 
 
\references 
 
Kholopov, P.N., 1985, {\it General Catalog of Variable Stars}, Moscow 
 
 
Space Telescope Science Institute, 1992, {\it The Guide Star Catalog 
v1.1}, Baltimore 
 
\endreferences 
 
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