Hipparcos-2 BestNeighbour table lists each matched external catalogue object with its best neighbour in Gaia.


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This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

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Name Type UCD Unit Description
source_id long
Unique Gaia source identifier
original_ext_source_id long Original External Catalogue source identifier
angular_distance double pos.angDistance arcsec Angular Distance between the two sources
number_of_neighbours int meta.number Number of neighbours in Gaia Catalogue
gaia_astrometric_params short meta.code.status Number of Gaia astrometric params used