2014MNRAS.443.3082T

A detailed study of the rare nearby quadruple system with a three-tier hierarchy is presented, contributing to the still scarce data on such multiples. We compute the first combined spectroscopic and interferometric orbit of HD 12889 with a period of 2.58 yr and eccentricity 0.77. This refers to the inner pair Aa, Ab in the quadruple system ADS 1652 which also contains the visual binary A, B with a known orbit of ∼ 200 yr period and another companion, C (HD 12873), at a projected distance of 2500 au from A. Photometry of all components is provided. The multiple system is located at a distance of 44 pc and it is composed of main-sequence dwarfs with estimated masses of 0.74, 0.72, 0.57, and 0.78 solar masses for Aa, Ab, B and C, respectively. The orbits of Aa, Ab and A, B are likely coplanar.