An Analysis of the Systematic Errors of Spectral Type of the Photoelectric Astrolabe of Type Ⅱ

In this Paper, the systematic errors of spectral type of three photoekctric astrolabes of type Ⅱ at Beijing Observatory, Shanghai Observatory and Yunnan Observatory are calculated respectively.Except for the stars of type B, the differences, as for other stars, are quite small; and therefore it may be considered on a whole that there is no systematic error of spectral type of the photoelectric astrolabes of type Ⅱ.Perhaps, some small fluctuations relative to the spectral type which appear in the calculation of the observations are caused by accidental cuors.