Luni-solar precession - Determination from lunar laser ranges

Details Luni-solar precession - Determination from lunar laser ranges Luni-solar precession - Determination from lunar laser ranges

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...241l...9w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 241, no. 1, Jan. 1991, p. L9-L12.

Astronomy and Astrophysics

Astronomy

39

Astrometry, Laser Range Finders, Lunar Rangefinding, Nutation, Precession, Orbital Mechanics, Sun, Very Long Base Interferometry, Astronomy, Moon, Laser Methods, Remote Sensing, Precession, Analysis, Nutation, Magnitude, Models, Calculations, Techniques, Comparisons

Scientific paper

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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