Speckle Measurements and Differential Photometry of Visual Binaries with the 6 Meter Telescope of the Special Astrophysical Observatory

Abstract

Results of speckle measurements and differential photometry carried out with the 6 m telescope of the Special Astrophysical Observatory (Russia) at the end of 2004 are presented. One new (COU 1569) and four improved orbits (ADS 440AC, ADS 1729, ADS 5726, and COU 1897), as well as their dynamical mass estimates, are reported.