Table 3
Global astrometric solution for WFI CCD mosaics.
| (α,δ)–UCAC2 | UCAC2 | ||||
| Before G.S. | After G.S. | Star | |||
| TNOs | σα | σδ | σα | σδ | No. |
| mas | mas | mas | mas | ||
|
|
|||||
| Eris | 62 | 63 | 49 | 54 | 232 |
| Haumea | 45 | 44 | 46 | 46 | 617 |
| Ixion | 66 | 65 | 53 | 52 | 6229 |
| Makemake | 41 | 43 | 46 | 49 | 523 |
| Orcus | 80 | 73 | 56 | 54 | 842 |
| Quaoar | 96 | 91 | 56 | 55 | 5996 |
| Sedna | 50 | 53 | 53 | 53 | 396 |
| Varuna | 53 | 57 | 49 | 52 | 1793 |
| 2002 TX300 | 58 | 64 | 46 | 50 | 1617 |
| 2003 AZ84 | 56 | 56 | 49 | 49 | 3706 |
Notes. The (σα,σδ) refer to the observed minus UCAC2 positions computed before and after the global solution (G.S.) procedure. Last column is the number of used UCAC2 reference stars. All values are averages over the results for each sky path year. For more details about the mosaic global solution, see Sect. 4.3 of P1.
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