VizieR Online Data Catalog: Fourth preliminary catalogue of stars (PPCP4; Wang+ 1991)
Abstract
On the photon counter data observed with Photoeleetric Transit Instrument of Beijing Astronomical Observatory during the period from 1988 to 1990, corrections of right ascensions of 324 stars are given. The mean precision (<m{DELTA}αcosδ>) is 4.7ms. The mean observational epoch is 1989.7. The relations of residuals with magnitudes and spectral types are discussed and given respectively. Finally the systematic corrections (PPCP4-FK4) are also analysed. (1 data file).
- Publication:
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VizieR Online Data Catalog (other)
- Pub Date:
- April 1997
- Bibcode:
- 1997yCatp007001702W
- Keywords:
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- Fundamental catalog;
- Stars: fundamental