The Photoelectric Equal Altitude Catalogues of Yunnan Observatory (From December in 1976 to December in 1981)

This contribution reports on the star position corrections of 182 stars which passed across the circle of equal altitudes twice and of part of the stars which.passed across the parallel of altitude once, observed with the Ⅱ type photoelectric astrolabe of Yunnan Observatory from December of 1976 to December of 1981.The regional systematic error of FK₄ Catalog is calculated by means of these corrected values.