摘要
The comparison of the Belgrade Catalogue of Double Stars(BCDS)with the Pre-liminary General Catalogue of Double Stars(PGCDS)was analysed in right ascen-sion,declination,magnitude and spectral type.Existence of Δα and Δδ systematicerrors for all spectral types is indicated.The effect can probably be explained by thedifference in the atmospheric refraction for different spectral types.This depends onthe quality of the determined right ascensions and declinations derived from observa-tions of stars at some observatories.
The comparison of the Belgrade Catalogue of Double Stars (BCDS) with the Preliminary General Catalogue of Double Stars (PGCDS) was analysed in right ascension, declination, magnitude and spectral type. Existence of Δα and Δδ systematic errors for all spectral types is indicated. The effect can probably be explained by the difference in the atmospheric refraction for different spectral types. This depends on the quality of the determined right ascensions and declinations derived from observations of stars at some observatories.
出处
《中国科学院上海天文台年刊》
1993年第14期95-99,共5页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
