Accession Number : ADA534090


Title :   The Phases Differential Astrometry Data Archive. 2. Updated Binary Star Orbits and a Long Period Eclipsing Binary


Descriptive Note : Journal article


Corporate Author : NAVAL OBSERVATORY WASHINGTON DC


Personal Author(s) : Muterspaugh, Matthew W ; Hartkopf, William I ; Lane, Benjamin F ; O'Connell, J ; Williamson, M ; Kulkarni, S R ; Konacki, Maciej ; Burke, Bernard F ; Colavita, M M ; Shao, M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a534090.pdf


Report Date : Dec 2010


Pagination or Media Count : 9


Abstract : Differential astrometry measurements from the Palomar High-precision Astrometric Search for Exoplanet Systems have been combined with lower precision single-aperture measurements covering a much longer timespan (from eyepiece measurements, speckle interferometry, and adaptive optics) to determine improved visual orbits for 20 binary stars. In some cases, radial velocity observations exist to constrain the full three-dimensional orbit and determine component masses. The visual orbit of one of these binaries?α Com (HD 114378)?shows that the system is likely to have eclipses, despite its very long period of 26 years. The next eclipse is predicted to be within a week of 2015 January 24.


Descriptors :   *ORBITS , *BINARY STARS , *ECLIPSES , *SPECKLE INTERFEROMETRY , OPTICAL LENSES , RADIAL VELOCITY , ADAPTIVE OPTICS , SPHERICAL ASTRONOMY , ARCHIVES , THREE DIMENSIONAL , MEASUREMENT


Subject Categories : Astronomy
      Celestial Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE