Inner and Outer Orbits in 13 Resolved Hierarchical Stellar Systems

Abstract Orbits of inner and outer subsystems in 13 triple or higher-order stellar systems are computed updated using position measurements and, three cases, radial velocities. The goal is to determine mutual orbital inclinations, period ratios, masses complement the statistics hierarchical systems. effect on motion orbits (wobble) explicitly modeled mass ratios. Stars studied here (HD 5408, 8036, 9770, 15089, 29310, 286955, 29316, 140538, 144362, 154621, 156034, 185655, 213235) bright nearby (from 15 pc 150 pc). Their periods range from 1.7 yr 49 yr, 83 2400 yr. Some long-period poorly constrained. Four astrometric one orbit for first time.