Corrections to the FK5 reference frame

Details Corrections to the FK5 reference frame Corrections to the FK5 reference frame

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225..723j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, April 1, 1987, p. 723-730.

Astronomy and Astrophysics

Astronomy

9

Celestial Reference Systems, Equinoxes, Error Analysis, Magnetic Equator, Ephemerides, Lunar Occultation, Solar Position, Stellar Occultation

Scientific paper

Corrections to the equinox and equator of the FK5 reference frame have been obtained from an analysis of lunar occultations of stars made in the period AD 1800 to 1980. The ephemeris DE200/LE200 was used to reduce the data. The results show that the FK5 and dynamical equinox (defined by the ephemeris) agree closely at J2000.0; but they show that the equinox of the FK5 has a motion of -0.226±0.028 arcsec cy-1 with respect to the dynamical equinox. The equator of the FK5 differs from the dynamical equator by -0.099±0.006 arcsec at J2000.0 and has a motion of -0.150±0.009 arcsec cy-1 with respect to the dynamical equator.

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