| Catalog name | Number of stars | Completeness | Astrometric precision | Photometry | Notes | |
|---|---|---|---|---|---|---|
| Precision | Bands | |||||
| Hipparcos | 118,218 | complete to 7.3 ÷ 9.0m; have stars to 12.4m |
0.001" to 0.003" | 0.001m to 0.002m for brighter stars |
V, B | |
| Tycho-2 | 2.5 million | stars 2.0m to 12m; 99% complete to 11.0m; 95% complete to 11.5m |
0.01" to 0.1" | for <9m ±0.012m for >9m ±0.06m for 11.5m ±0.15m |
VT, BT | VT and BT magnitudes are close to V and B |
| USNO-A2.0 | 526,230,881 | stars to 18m | 0.25" | 0.5m to 2m at maximum due to photometric calibration errors |
B, R | No proper motions; Superseded by USNO-B1.0. |
| USNO-B1.0 | 1,042,618,261 | stars to 21m | 0.2" | 0.3m | B, R and partially I | |
| UCAC-2 | 48 million | basically 8.0 to 16.0m | 0.02" to 0.07" | 0.1m to 0.3m (but non-standard color band) |
*UC J, K |
Preliminary catalog covering 86% of the sky below 45°. Photometry is poor, with errors on the order 0.1 to 0.3 magnitudes in a single, non-standard color. J and K magnitudes are taken from 2MASS |
| GSC 2.3.2 | 945,562,683 | stars to 20m | basically 0.3"; 0.35" to 0.75" on plate edges for stars >16m |
0.2m to 0.25m | F, j, N, O, E and partially V (for nothern declinations) |
No proper motions; F band is photographic red, j band is photographic blue |
| GSPC 2.4 | 554,007 | stars basically 14m to 19m and fainter |
immaterial | < 0.07m | V, R and partially B | These faint star photometry catalogs doesn't pretend to a completeness, they just cover some fields (centers of Palomar plates in case of GSPC). |
| LONEOS photometry for faint field stars |
34,300 | stars basically 10m to 20m and fainter |
immaterial | < 0.05m | V, B and partially U, R, I | |