On the Improvement of the α_δ System of the FK4 Catalogue

Abstract

Abstract. About 45 000 absolute and semi-absolute observations of right ascension of the FK4 stars were obtained during [1963][1964][1965][1966][1967][1968][1969][1970][1971][1972]. The observations were made with the three instruments of the Cerro Calan Observatory jointly by Chilean and Soviet astronomers. As a result, systematic A(x d cos8 errors were found to exist in the FK4 catalogue. For the reduction of star observations according to the SRS program, it is necessary to derive the system of the AOL corrections for the FK4.

Plans for the Improvement and Extension of the FK4

“…More recent observations have been discussed by Gliese (1970Gliese ( , 1974. From the reports by Anguita et al (1968Anguita et al ( , 1971Anguita et al ( , 1974 and Hog and Nikoloff (1974) it has become clear that the FK4 system in right ascension requires an appreciable correction in the declination zone -50° to -80°. Zverev (1968) has reported on absolute observations made in the USSR that indicate some significant regional deviations from the FK4 in right ascension, and Yasuda (1972) has reported on semi-absolute observations which resulted in corrections to right ascensions.…”

Observations in Chile and Results Related to Southern Hemisphere Systems (Invited Paper)

“…The methods of observation and reduction were described by Anguita et al (1971). The catalogue contains the results of observations of Kustner series of the FK4 stars with the Repsold Meridian Circle (d= 19 cm,/=244 cm) in the declination zone +41° to -90° (from -68° to -90° in lower culmination).…”