Table 1
Basic statistics on the contents of Gaia DR1.
| Source numbers | |
|
|
|
| Total number of sources | 1 142 679 769 |
| No. of primary (TGAS) sources | 2 057 050 |
| Hipparcos | 93 635 |
| Tycho-2 (excluding Hipparcos stars) | 1 963 415 |
| No. of secondary sources | 1 140 622 719 |
| No. of sources with light curves | 3194 |
| Cepheids | 599 |
| RR Lyrae | 2595 |
|
|
|
| Magnitude distribution percentiles (G) | |
|
|
|
| 0.135% | 11.2 |
| 2.275% | 14.5 |
| 15.866% | 17.1 |
| 50% | 19.0 |
| 84.134% | 20.1 |
| 97.725% | 20.7 |
| 99.865% | 21.0 |
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