Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.387..772p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 387, Issue 2, pp. 772-782.
Astronomy and Astrophysics
Astronomy
6
Techniques: Interferometric, Astrometry, Binaries: Close, Binaries: Visual, Stars: Individual: Ads 277
Scientific paper
We present relative astrometric measurements of visual binaries made during the first semester of 2006, with the Pupil Interferometry Speckle camera and COronagraph at the 102-cm Zeiss telescope of the Brera Astronomical Observatory, in Merate. Our sample contains orbital couples as well as binaries whose motion is still uncertain. We obtained 217 new measurements of 194 objects, with angular separations in the range 0.1-4.2arcsec, and an average accuracy of 0.01arcsec. The mean error on the position angles is 0.5°. About half of those angles could be determined without the usual 180° ambiguity by the application of triple-correlation techniques. We also present a revised orbit for ADS 277 for which the previously published orbit resulted in a large residual from our measurements.
Argyle Robert W.
Aristidi Eric
Ghigo Mauro
Koechlin Laurent
Pansecchi Luigi
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