SIMBAD references

2005AJ....130..809G - Astron. J., 130, 809-814 (2005/August-0)

An astrometric study of the binary star α Ophiuchi.


Abstract (from CDS):

The work reported here combines data from the Multichannel Astrometric Photometer (MAP), the European astrometric satellite, Hipparcos, and infrared speckle observations of the nearby subgiant binary star system α Oph. The A5 IV primary is found to have a mass of 2.84±0.19 M, while the approximately K2 V companion has a mass of 0.78±0.058 M. The distance modulus is 0.834±0.024 mag, yielding an absolute visual magnitude of 1.248±0.025 mag and an absolute K magnitude of the secondary of 4.3±0.2 mag. Tables list the MAP data and an ephemeris that indicates that the next 4 yr are ideal for further interferometry.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Binaries: Visual - Stars: Individual: Constellation Name: α Ophiuchi

Nomenclature: Table 1: Gat NNNN (Nos 1313-1320, 1322-1323) added.

Simbad objects: 11

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