Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112..276m&link_type=abstract
Astronomical Journal v.112, p.276
Astronomy and Astrophysics
Astronomy
20
Stars: Individual: Fin 347, Binaries: Spectroscopic
Scientific paper
Visual, interferometric, and spectroscopic observations are presented for the nearby solar-type binary Fin 347 Aa. In a new solution combining both astrometric and spectroscopic data the orbital period is found to be 987.9 days or 2.7048 years, the semimajor axis 2.42 AU or 0".116, the eccentricity 0.429, and the inclination 124°.31. The masses and luminosities for this pair of G8 V stars are 1.015±0.038 Msun, 0.933±0.039 Msun, 0.64±0.06 Lsun, and 0.62±0.06 Lsun, respectively. The orbital parallax of 0".0480±0".0011 gives a distance of 20.84±0.47 pc. The small formal errors on all orbital elements leads to small errors for the masses and luminosities. The stars are found to be slightly over-massive and under-luminous for their spectral classifications.
Hartkopf William I.
Mason Brian D.
McAlister Harold A.
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