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Table 5
Results for Umbriel.
| Year | Δα ∗ | Δδ | σα ∗ | σ δ | eα ∗ | e δ | # |
| (mas) | (mas) | (mas) | positions | ||||
|
|
|||||||
| 1992 | 8 | –13 | 31 | 20 | 54 | 47 | 60 |
| 1993 | –11 | –30 | 21 | 25 | 49 | 54 | 115 |
| 1994 | 36 | –54 | 37 | 48 | 51 | 49 | 68 |
| 1995 | 27 | –24 | 39 | 45 | 49 | 49 | 230 |
| 1996 | –36 | –7 | 66 | 48 | 56 | 54 | 259 |
| 1997 | –22 | –23 | 77 | 20 | 56 | 47 | 68 |
| 1998 | –8 | 15 | 32 | 15 | 52 | 36 | 23 |
| 1999 | –63 | –3 | 73 | 57 | 49 | 51 | 36 |
| 2001 | –18 | –33 | 36 | 35 | 36 | 37 | 60 |
| 2002 | –9 | –6 | 36 | 37 | 54 | 51 | 122 |
| 2003 | –29 | –13 | 72 | 43 | 62 | 58 | 91 |
| 2004 | –31 | –29 | 55 | 43 | 59 | 53 | 110 |
| 2005 | –18 | –69 | 11 | 10 | 43 | 54 | 19 |
| 2006 | –45 | –38 | 40 | 49 | 56 | 58 | 61 |
| 2009 | 17 | –118 | 22 | 30 | 61 | 61 | 30 |
| 2010 | –117 | 30 | 36 | 12 | 72 | 66 | 99 |
| 2011 | –54 | –47 | 56 | 48 | 57 | 52 | 536 |
Notes. Columns: same as Table 3.
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