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Published online by Cambridge University Press: 03 August 2017
The various characteristics of the HIPPARCOS Input Catalogue are described:
– How to select 110 000 stars for HIPPARCOS observation from the 210 000 proposed stars, taking into account the following sometimes conflicting requirements : satisfy a maximum of scientific programmes and respect the observational constraints inherent in the HIPPARCOS satellite operation ?
– What are the present results regarding the principal astrometric programmes ?
– How to process the specific problems which are raised by the HIPPARCOS observation of double and multiple stars and of stars in dense areas ?
– Which compilations and observations have been undertaken and are in progress within the frame of the Input Catalogue preparation ? What will be the quality of the final data ?
Finally, the contents of the catalogues and annexes that will be published are briefly presented.