Tycho-Gaia Astrometric Solution (TGAS) Source Table
This table is a subset of gaia_source comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release 1. This is possible because the early Hipparcos epoch positions break some degeneracies due to the limited Gaia time coverage. This table contains a substantial fraction of the around 2.5 million stars in the Hipparcos and Tycho-2 catalogue. Many stars have been excluded due to several reasons, such as saturation, cross-match errors or bad astrometric solution.
ShareScore
20/100
Overall dataset sharing score
Score breakdown
These five areas show where the dataset supports — or may limit — practical reuse.
- Stewardship
- 4
- Harmonization
- 4
- Access
- 4
- Reuse readiness
- 8
- Engagement
- 0
Dataset details
- Repository
- nasa
- Published
- April 1, 2025
- License
- notspecified
- DOI
- tycho-gaia-astrometric-solution-tgas-source-table
Scored with release 0.9.0
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