star, showing slightly stronger than normal lines of singly-ionized barium. This star has an estimated 2.34 times the mass of the Sun and, at an estimated age of 1.24 billion years, has expanded to 25 times the Sun's radius. HD 11366 (WDS J01515-1020B), of spectral type K0 III, is further away (419 parsecs, compared to WDS J01515-1020A's 72 parsecs), and is therefore not a member of the system but a chance alignment - this is referred to as an optical companion. References K-type giants Spectroscopic binaries Suspected variables Barium stars Cetus (constellation) Baten Kaitos Ceti, Zeta BD-11 359 Ceti, 55 011353 008645 0539