Preliminary Orbits for Eight Visual Binaries

Abstract

This paper reports orbits and masses calculated for the visual binary stars WDS 00427-6537 (I440), WDS 01084-5515 (RST 1205 AB), WDS 01343-0827 (A314), WDS 03590+0947 (HU 27), WDS 10287+4558 (A1993), WDS 12429+0516 (A1602), WDS 20157+4339 (A2095 AB), and WDS 22180-6249 (I20). All the orbits have previously been announced in IAU Commission 26 Information Circulars; for all except WDS 20157+4339, they are the first orbits to have been published. They are accompanied by ephemerides, residuals with respect to observations, and figures of the apparent orbits. Masses (calculated using both Hipparcos and dynamic parallax data, except for WDS 20157+4339, for which no Hipparcos data are available) are accompanied by estimates of uncertainty. Features of the orbits and physical properties are discussed.