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The Orbit of the Visual Binary ADS 8630

Published online by Cambridge University Press:  09 August 2007

Marco Scardia ,
Robert Argyle ,
Jean-Louis Prieur ,
Luigi Pansecchi ,
Stefano Basso ,
Nicholas Law  and
Craig Mackay
Marco Scardia
Affiliation:
I.N.A.F. - Osservatorio Astronomico di Brera, Via E. Bianchi 46, 23807 Merate, Italy
Robert Argyle
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK email: [email protected]
Jean-Louis Prieur
Affiliation:
UMR 5572 d'Astrophysique, Observatoire Midi-Pyrénées, CNRS, Univ. Paul Sabatier, 14, Avenue Edouard Belin, 31400 Toulouse, France
Luigi Pansecchi
Affiliation:
I.N.A.F. - Osservatorio Astronomico di Brera, Via E. Bianchi 46, 23807 Merate, Italy
Stefano Basso
Affiliation:
I.N.A.F. - Osservatorio Astronomico di Brera, Via E. Bianchi 46, 23807 Merate, Italy
Nicholas Law
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK email: [email protected]
Craig Mackay
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK email: [email protected]
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Abstract

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Using the 35 speckle measurements performed with PISCO in Merate between 2004 and 2006, and some complementary new astrometric measures, we present a new orbit for the visual binary ADS 8630 = γ Vir. This new series of measurements was essential for constraining the 169 year-period orbit since it covers an arc of 130° in the apparent orbit and includes the periastron passage of 2005.

Keywords

Stars: binaries: closevisual – Astrometry – Techniques: interferometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 558 - 566
Copyright
Copyright © International Astronomical Union 2007

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