Orbit and parallax of Sigma 1819

Details Orbit and parallax of Sigma 1819 Orbit and parallax of Sigma 1819

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..509h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, June 1987, p. 509-511.

Astronomy and Astrophysics

Astronomy

11

Binary Stars, Orbital Elements, Stellar Orbits, Stellar Parallax, Main Sequence Stars, Stellar Luminosity

Scientific paper

The paper presents a new parallax, proper motion, and orbit for the 7th magnitude G0 V pair Sigma 1819. The absolute parallax is +0.027 + or - 0.006 arcsec (s.e.). With the newly determined orbital elements (P = 220.0 y, a = 1.117 arcsec) the components are found to be main-sequence stars of equal mass (about 0.74 the solar mass) with absolute magnitudes of 4.7 and 4.8.

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