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New orbital period and period variation of the W UMa-type eclipsing binary, VZ Librae, are presented. It is discovered that the orbital period of VZ Librae shows a periodic change with an amplitude of 0.0200d and a period of 17.1year. The cyclic period change can be explained as the light travel-time orbit of a tertiary component in the system. This is consistent with the spectroscopic results by...
Photometric solutions of four new discovered W UMa-type binaries were carried out for the first time by using the 2003 version of the W-D program. It is discovered that all of the four systems are over-contact binaries. Two binaries, GSC 0804-0118 and GSC 2936-0478, are of A-subtype, while two other binaries, GSC 1848-1264 and GSC 0619-0232, are of W-subtype. From our solutions, the fundamental orbital...
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