Speckle Interferometry at the U.S. Naval Observatory. XXII

TL;DR

This paper reports on 4,747 high-precision double star observations using speckle interferometry at the U.S. Naval Observatory, improving orbital data and providing detailed measurements over a one-year period.

Contribution

It presents a large dataset of speckle interferometry measurements and updates four double star orbits, enhancing the accuracy of stellar binary parameters.

Findings

Over 4,700 observations of double stars collected.

Median separation of observed systems is 8.673 arcseconds.

Four double star orbits have been improved.

Abstract

The results of 4,747 intensified CCD observations of double stars, made with the 26-inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over two thousand short-exposure images. These observations are averaged into 2,667 mean relative positions and range in separation from 0.328" to 95.9", with a median separation of 8.673". Four orbits are improved. This is the 22nd in this series of papers and covers the period 4 January 2016 through 29 December 2016.