The results of 3362 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 2000 short-exposure images. These observations are averaged into 1970 mean relative positions and range in separation from 0.78" to 72.17", with a mean separation of 14.76". This is the 17th in this series of papers and covers the period 2010 January 6 through December 20. Also presented are 10 pairs that are resolved for the first time.

Cone search capability for table J/AJ/142/46/table1 (New WSI pairs (Washington Stellar Interferometer))

Cone search capability for table J/AJ/142/46/table2 (Intensified CCD measurements of double stars)

Cone search capability for table J/AJ/142/46/table3 (Measurements of systems with orbits or rectilinear solutions)