The Periods of TY and TZ
Lauren V. Jones
Maria Mitchell Observatory,
Nantucket, MA 02554
Received: 15 December
The periods of TY and TZ
Canes Venatici, both RR Lyrae stars, are studied by means of O-C
diagrams. The diagram for
TY CVn is definitely not linear but the limited amount of data do not
define the functional form.
Linear elements approximating the behavior in 1977-1987 are:
JD(max) = 2445294.188 +
0.51344266 E. TZ CVn seems to have a constant period, although slightly
different from the
published value. The new elements are: JD(max) = 2434967.113 + 0.55187911 E.