The FK5 equator and equinox from observations of minor planets

Details The FK5 equator and equinox from observations of minor planets The FK5 equator and equinox from observations of minor planets

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.2099b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, no. 6, June 1992, p. 2099-2101.

Astronomy and Astrophysics

Astronomy

9

Asteroids, Astronomical Photometry, Celestial Reference Systems, Equators, Equinoxes, Astronomical Catalogs, Least Squares Method

Scientific paper

The present 413 photographic observations on the FK4 system of 16 minor planets made at four observatories, are used to estimate corrections to the FK5 equinox and equator. The observations are reduced to the system of the FK5. Equinox and equator corrections are calculated from the L1 method, standard least squares, and iteratively reweighted least squares with three weight functions: Talwar, Biweight, and Welsch. Statistical tests indicate that the L1 solution, which calculates an equinox correction of -0.153 +/- 3.157 arcsec and an equator correction of 0.220 +/- 1.187 arcsec, best represents the observations. Given the magnitude of the errors, however, the significance of the corrections may be questioned.

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