Tycho-2 neighbourhood (gaiadr2.tycho2_neighbourhood)
The table has 2482025 rows, 6 columns.
Description
Tycho-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.
Attribution
If you have used Gaia data in your research, please use the following acknowledgement:
This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.
More information can be found on the credit and citation instructions page.
Columns
| Name | Type | UCD | Unit | Description |
|---|---|---|---|---|
| tycho2_oid | long | meta.id.cross |
External Catalogue source identifier |
|
| source_id | long |
meta.id meta.main meta.ref |
||
| original_ext_source_id | char | |||
| angular_distance | double | |||
| score | double | |||
| gaia_astrometric_params | short |