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Study of the Binary Star ADS 7251 by Observations on the 65-cm Refractor at Pulkovo from 1962-2018

Romanenko, L. G.; Izmailov, I. S.; Shakht, N. A. +1 more

Results are presented from a study of the binary star ADS 7251 (STF 1321) based on a uniform series of observations on the 65-cm refractor at Pulkovo from 1962 through 2018. The errors in the yearly average positions ρ and θ are equal to 0''.004 and 0°.02 for the photographic and 0."003 and 0.°01 for the CCD observations. A new orbit is calculated…