HD 180685

Photoelectric minima of 30 eclipsing binary systems Not Available
Radial-velocity measurements. V - Ground support of the HIPPARCOS satellite observation program The paper presents data on 1070 radial velocity measurements of starsdistributed in 39 fields measuring 4 deg x 4 deg. The PPO series ofFehrenbach et al. (1987) and Duflot et al. (1990) is continued using theFehrenbach objective prism method.
Photometric study of the V889 AQL eclipsing binary system with relativistic orbital rotation Not Available
A photometric research on the eclipsing binary V889 AQL Not Available
Apsidal Motion in Binary Systems. II. Photoelectric Observations of Six Eclipsing Variables with Apsidal Motion Not Available

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