Analytical expressions of the Earth's position and velocity for the calculation of apparent positions.

Details Analytical expressions of the Earth's position and velocity for the calculation of apparent positions. Analytical expressions of the Earth's position and velocity for the calculation of apparent positions.

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cemec..41..389s&link_type=abstract

Celestial Mechanics, Volume 41, Issue 1-4, pp. 389-410

Astronomy and Astrophysics

Astronomy

2

Earth:Positions, Earth:Velocity, Positions:Earth, Velocity:Earth

Scientific paper

In order to calculate apparent places of stars, the barycentric and heliocentric positions of the Earth and the barycentric velocity of the Earth are required. It is shown that several tens of trigonometric terms for their expressions are sufficient for analyses of optical observations which have an observational accuracy of the order of 0arcsec.001. The authors also give the analytical expressions of the position and velocity of the Earth with higher precision so that they can be used in the analyses of precise astrometry such as VLBI observations.

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