NASA NTRS · 19910041055
Luni-solar precession - Determination from lunar laser ranges
Abstract
Two decades oflunar laser ranges have been analyzed to determine corrections to the earth's luni-solar precession constant and 18.6 yr nutation coefficients. The correction to the IAU-adopted precession constant is -2.7 + or - 0.4 milliarcsec/yr (mas/yr), giving the luni-solar precession constant as 50.3851 arcsec/yr at J2000. The 18.6 yr nutation of the pole is found to be 3.0 + or - 1.5 mas larger in magnitude than the 1980 IAU series. The correction to the annual term, previously discovered by VLBI, is found to be 1.8 + or - 0.5 mas if assumed to be a circular correction to the nutation of the pole.
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Williams, J. G., Newhall, X. X., Dickey, J. O.. 1991-01-01. Luni-solar precession - Determination from lunar laser ranges. https://ntrs.nasa.gov/citations/19910041055
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