2001A&A...374..243W

Several new times of minimum light recorded with photoelectric means have been gathered for two bright eccentric eclipsing binaries TV Cet (P=9.1d, e=0.055) and V451 Oph (P=2.2d, e=0.013). Analysis of all available eclipse timings of TV Ceti has revealed a small motion of the line of apsides of {dot}(ω)=0.00030±0.00008deg/cycle, corresponding to an apsidal period of U=30000±8000 years. The contribution from the general relativity effects is dominant ({dot}(ω)_rel/{dot}(ω)∼80%). In this system, the third body on an eccentric orbit with a period of 28.5 years is also predicted. The more precise values for the apsidal motion elements were computed for V451 Oph, where apsidal motion with a period of 170±5 years was confirmed. The corresponding internal structure constants log k₂ were derived.