Period study of RS Sagittarii

Abstract

New times of minimum for the eclipsing binary RS Sgr were determined. These minima were added with previous photoelectric, photographic, and visual estimates. A weighted linear and parabolic least squares fit was performed with all minima. The result of this fit is that the period is constant between the errors of the parabolic coefficient (∼1.0x10⁻¹⁰). The "history" of the system is about 14000 cycles (1895-1985).