SDSS DR9 Neighbourhood table includes all good neighbours for each matched Gaia object. A good neighbour for a given Gaia object is a nearby object in the external catalogue 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
sdssdr9_oid long External Catalogue source identifier
source_id long
original_ext_source_id char
angular_distance double
score double
gaia_astrometric_params short