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Table 2
Astrometric (α, δ) reduction for each observational telescope set.
| Mean errors | No. of | UCAC4 | ||
| Telescope | σ α | σ δ | frames | stars |
| mas | mas | |||
|
|
||||
| Zeiss (60 cm) | 32 | 57 | 833 | 131 |
| Boller & Chivens (60 cm) | 76 | 67 | 2837 | 235 |
| Perkin-Elmer (1.6 m) | 68 | 84 | 742 | 46 |
| ESO/MPG/WFI (2.2 m) | 53 | 52 | 145 | 2357 |
Notes. Mean errors are the standard deviations in the (O−C) residuals from (α, δ) reductions with the UCAC4 catalog.
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