No of Plates: ~7000
Plate FOV: 6o x 6o
Digitised image: 23040 x 23040 pixels (1.1 GB)
| Feature | GSC 1.2 | GSC 2.x |
|---|---|---|
| No of Objects | ~18.E+06 | ~2.E+09 |
| No of Epochs | 1 | at least 2 |
| No of Colours | 1 | at least 2 |
| Completeness | V=15 | V=18 |
| Astrometrical accuracy | 1"÷1.5" | 0.5" |
| Detectable Absolute Proper Motion | N/A | >= 70 ± 4 mas/yr |
| Photometric Accuracy | 0.4 mag | 0.1÷0.2 mag |
| Plate Scale | 1.7 "/px | 1 "/px |
| Version | Date |
|---|---|
| GSC 2.0 | Apr 1999 |
| GSC 2.1 | End 1999 |
| GSC 2.2 | End 2000 |
| GSC 2.3 | ? |