Third Preliminary Catalogue of Stars Observed With the Photoelectric Astrolabe

On the basis of the data observed with the Photoelectric Astrolabe Mark II of the Beijing Astronomical Observatory during the period from 1982 to 1988, residuals of 355 fundamental stars and 2921 catalogue stars are reduced and analyzed. The relations between the residuals V and the magnitude M, and the spectral type S of FK5 stars are discussed. The position corrections (PACP3—FK5), Δα′s and Δδ′s, from the double passage of the stars are determined. There are 910 in Δα and 696 in Δδ. The mean precisions of Δα′s and Δδ′s are ±3.9 ms and ±0″.067, respectively. Under certain conditions 328 Δα′s and 12 Δδ′s from the observed single passage of the stars are determined. Finally systematic corrections of PACP3—FK5 are given.