The Rapid Convergence of 44 Boötis with Revised Orbit and Updated Ephemerides

Details The Rapid Convergence of 44 Boötis with Revised Orbit and Updated Ephemerides The Rapid Convergence of 44 Boötis with Revised Orbit and Updated Ephemerides

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jdso....7...24z&link_type=abstract

Journal of Double Star Observations, vol. 7, no. 1, p. 24-36.

Astronomy and Astrophysics

Astronomy

1

Binaries: Visual, Binaries: Orbit, Stars: Individual: Stf1909

Scientific paper

In this article I investigate the apparent orbital motion for the visual double star 44 Boötis (WDS 15038+4739, i Boötis) near periastron. Observations from about 200 years and the comparison with recent orbit references from the literature show systematic increasing differences between observed and calculated positions in polar coordinates. The current separation of the components of 1.6 arcsec is expected to approach 0.2 arc seconds in the next 10 years. Based on the calculation of a new and improved orbit and updated ephemeris, the expected positions are predicted more accurately.

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