TABLE gaia_hip_tycho2_match

Cross-identifications between Gaia and Tycho2/Hipparcos sources used in TGAS

Table providing information on the crossmatch used in the Tycho-Gaia Astrometric
Solution (TGAS) between Gaia and Tycho2/Hipparcos sources.

Required constraints:
Primary key is (solution_id,source_id)

Name Type Length Unit Description Default Value Unified Content Descriptor

solution_id bigint 8 Solution identifier meta.id;meta.version

source_id bigint 8 Unique source identifier meta.id;meta.main

hip_tyc_oid bigint 8 Initial Gaia Source List identifier for Hipparcos/Tycho2 id.cross

original_ext_source_id varchar 16 Original source identified in Hipparcos/Tycho2 id.cross

ext_cat_solution_type varchar 1 Type of solution in the Hipparcos/Tycho2 catalogue meta.code

Total length 41

Name	Type	Length	Description	Unified Content Descriptor
solution_id	bigint	8	Solution identifier	meta.id;meta.version
source_id	bigint	8	Unique source identifier	meta.id;meta.main
hip_tyc_oid	bigint	8	Initial Gaia Source List identifier for Hipparcos/Tycho2	id.cross
original_ext_source_id	varchar	16	Original source identified in Hipparcos/Tycho2	id.cross
ext_cat_solution_type	varchar	1	Type of solution in the Hipparcos/Tycho2 catalogue	meta.code
Total length		41