Accession Number:

ADA561759

Title:

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

Descriptive Note:

Journal article

Corporate Author:

NAVAL OBSERVATORY WASHINGTON DC

Personal Author(s):

• Mason, Brian D.
• Hartkopf, William I.
• Friedman, Elizabeth A.

Report Date:

2012-05-01

Pagination or Media Count:

7.0

Abstract:

The results of 2490 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 1462 mean relative positions and range in separation from 056 to 7180, with amean separation of 1481. This is the 18th in this series of papers and covers the period 2011 January 3 through 2011 December 18. Also presented are four pairs which are resolved for the first time, thirteen other pairs which appear to be lost, and linear elements for four additional pairs.

Descriptors:

• *BINARY STARS
• ORBITS
• REPRINTS
• SPECKLE INTERFEROMETRY

Subject Categories:

• Astronomy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE