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Table 2
Estimated precision for offset observations in both right ascension and declination for different observatories.
| Source | IAU code | Observatory | Estimated precision |
| σi (in mas) | |||
|
|
|||
| MPC | – | all | Chesley et al. (2010) |
|
|
|||
| Offset | 809 | European South Observatory | bias |
| 874 | Observatório do Pico dos Dias | bias | |
| 586 | Pic du Midi | bias | |
| 493 | Calar Alto | bias | |
| J86 | Sierra Nevada | bias | |
| I95 | La Hita | bias | |
| Z20 | Mercator La Palma | bias | |
| J13 | Liverpool La Palma | bias | |
| – | Other | bias | |
|
|
|||
| Occultation | 244 | Geocentre – accurate position – | 40 |
| Geocentre – approximate position – | 75 | ||
|
|
|||
| Fraser et al. (2013) | 267 | CFHT | bias |
| 568 | Gemini-Mauna Kea | bias | |
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