Hipparcos-2 Neighbourhood table includes all good neighbours for each matched external catalogue object. A good neighbour for a given external catalogue object is a nearby object in Gaia whose position is compatible (within position errors) with the target.


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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
original_ext_source_id long Original External Catalogue source identifier
angular_distance double pos.angDistance Angle[arcsec] Angular Distance between the two sources
score double meta.code Score of neighbours
gaia_astrometric_params short meta.code.status Number of Gaia astrometric params used