The comparison of dec1inations from the Preliminary Compilation of DS-Pr0grammeStar Positions (PCDS) with those contained in the catalogues observed with meridian circlesof several northern observatories (Belgrade, Ki...The comparison of dec1inations from the Preliminary Compilation of DS-Pr0grammeStar Positions (PCDS) with those contained in the catalogues observed with meridian circlesof several northern observatories (Belgrade, Kiev, Moscow l, Moscow 2, Kazan) shows thesystematic differences depending on the spectral type of stars involved. The effect canprobably be explained by the differences in the atmospheric refraction for different spectraltypes.展开更多
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 a...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.展开更多
文摘The comparison of dec1inations from the Preliminary Compilation of DS-Pr0grammeStar Positions (PCDS) with those contained in the catalogues observed with meridian circlesof several northern observatories (Belgrade, Kiev, Moscow l, Moscow 2, Kazan) shows thesystematic differences depending on the spectral type of stars involved. The effect canprobably be explained by the differences in the atmospheric refraction for different spectraltypes.
文摘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.
