Gaussian year
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A Gaussian year is defined as 365.2568983 days.^{[1]} It was adopted by Carl Friedrich Gauss as the length of the sidereal year in his studies of the dynamics of the solar system. A slightly different value is now accepted as the length of the sidereal year,^{[2]} and the value accepted by Gauss is given a special name.
A particle of negligible mass, that orbits a body of 1 solar mass in this period, has a mean axis for its orbit of 1 astronomical unit by definition. The value is derived from Kepler's third law as
where
 k is the Gaussian gravitational constant.^{[3]}
See also
References
 ^ Standish, E. M. (20040601). "The Astronomical Unit now". Proceedings of the International Astronomical Union. 2004 (IAUC196): 163–179. doi:10.1017/S1743921305001365. ISSN 17439221.
 ^ Chamberlin, Alan. "Astrodynamic Constants". ssd.jpl.nasa.gov. Retrieved 20161116.
 ^ Herrick, S.; Jr, R. M. L. Baker; Hilton, C. G. (19580101). Hecht, F., ed. VIIIth International Astronautical Congress Barcelona 1957 / VIII. Internationaler Astronautischer Kongress / VIIIe Congrès International D’Astronautique. Springer Berlin Heidelberg. pp. 197–235. doi:10.1007/9783662399903_17. ISBN 9783662390207.
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