News of Sirius

Details News of Sirius News of Sirius

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987lastr.101...61b&link_type=abstract

L'Astronomie (ISSN 0004-6302), vol. 101, Feb. 1987, p. 61-66. In French.

Astronomy and Astrophysics

Astronomy

Binary Stars, Orion Constellation, Stellar Magnitude, Stellar Orbits, Astronomical Photometry, Companion Stars, Orbital Elements, Stellar Mass, White Dwarf Stars

Scientific paper

Past and recent observational data on the binary Sirius are considered, and new magnitude values and orbital elements for Sirius and its companion are discussed. The best recent values include an apparent magnitude value for Sirius of -1.46, an average magnitude value for the companion of 8.45, a Sirius B diameter of 10,147 km, and a real diameter for Sirius A of 1.68 times the solar diameter. Micrometric and photographic orbital elements are presented, and sources of error discussed. Based on the accurate orbital elements of Van den Bois (1960), an apparent semimajor axis of 7.50 arcsec, corresponding to a real distance of 19.8 astronomical units between Sirius and its companion, is derived. A value of 2.10 solar masses is attributed to the primary, and 1.04 solar masses to the companion.

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