Английская Википедия:HD 129132

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Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end

HD 129132 is a triple star[1] system in the northern constellation of Boötes. It is dimly visible to the naked eye with a combined apparent visual magnitude of 6.13.[2] The distance to this system is approximately 382 light years based on parallax, and it is drifting further away from the Sun with a radial velocity of +1.7 km/s.[3]

This system was found to be a spectroscopic binary by the Dominion Astrophysical Observatory in 1923. It was then shown to be a triple star system in 1937 by William E. Harper and Guy H. Blanchet.[4] The inner pair have an orbital period of 101.6 days and an eccentricity of 0.117, with the primary forming the visible component of this pair. The third component forms a visual system with the inner pair, orbiting with a period of Шаблон:Convert and an eccentricity of 0.073.[1][5]

The primary component appears to be an aging giant star with a stellar classification of F4III,[6] although it has also been classed as a G-type main-sequence star of type G0V.[7] It is around a billion years old with twice the mass of the Sun.[8] The star has expanded to 17[3] times the Sun's radius and is radiating 236[3] times the luminosity of the Sun at an effective temperature of 5,488 K.[3] It is spinning with a projected rotational velocity of 25.3 km/s.[8]

References

Шаблон:Reflist

Шаблон:Stars of Boötes

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