SPECTROSCOPIC ORBITS OF XI-PISCIUM, 60 ANDROMEDAE AND XI-1 CETI

The three stars referred to in this paper are all fourth-magnitude late-type giants which have long been known to exhibit small variations in radial velocity. Velocities measured photographically at Lick and photo-electrically at Cambridge are combined to determine their orbits. A brief discussion of radial-velocity zero-point difficulties is presented. © 1981 Royal Astronomical Society. Provided by the NASA Astrophysics Data System.