VizieR Online Data Catalog: UCAC5 Catalogue (Zacharias+ 2017)
Abstract
The UCAC5 positions on the Gaia coordinate system provide additional data of similar quality to the Hipparcos mission Tycho star observations and thus have the potential to improve the TGAS proper motions. UCAC5 provides new, accurate proper motions for millions of more stars fainter than TGAS, which will allow astronomers to have a preview into research possible only with the next Gaia data release. At the faint end UCAC5 proper motion errors are relatively large due to the low S/N ratio of these observations. Better proper motions for stars fainter than about 15th mag are available from proper motions obtained by combining NOMAD (Cat. I/297/) with Gaia DR1 (Cat. I/337) (catalog of 503 million stars is available upon request), or the recently published PPMXL re-reduction, called the HSOY (Altmann et al., 2017, Cat. I/339) catalog.
(2 data files).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- March 2017
- Bibcode:
- 2017yCat.1340....0Z
- Keywords:
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- Surveys;
- Positional data;
- Proper motions