Table 4
Astrometric data for the relative position of Orcus/Vanth used to reconstruct their mutual orbit.
| Date† | ΔX‡ | ΔY‡ | Δ | r | α | δ | Instr. |
| (JD) | (″) | (″) | (AU) | (AU) | (°) | (°) | |
|
|
|||||||
| 2 453 687.66400 | 0.206 | –0.147 | 47.811 | 47.702 | 144.039 | –4.356 | ACS |
| 2 454 040.36900 | 0.226 | –0.111 | 48.075 | 47.752 | 144.813 | –4.729 | ACS |
| 2 454 044.36600 | –0.258 | –0.005 | 48.013 | 47.752 | 144.839 | –4.766 | ACS |
| 2 454 051.57900 | –0.006 | –0.243 | 47.898 | 47.753 | 144.871 | –4.828 | ACS |
| 2 454 056.08900 | –0.036 | 0.240 | 47.824 | 47.754 | 144.882 | –4.865 | ACS |
| 2 454 066.14600 | 0.053 | 0.240 | 47.659 | 47.755 | 144.882 | –4.938 | ACS |
| 2 454 080.33600 | –0.030 | –0.244 | 47.433 | 47.757 | 144.824 | –5.019 | ACS |
| 2 454 416.29300 | –0.263 | –0.024 | 47.968 | 47.801 | 145.703 | –5.304 | NICMOS3 |
| 2 454 439.78000 | 0.245 | 0.078 | 47.585 | 47.804 | 145.696 | –5.473 | WFPC2 |
|
|
|||||||
| 2 455 250.73686 | 0.260 | 0.052 | 46.954 | 47.895 | 146.287 | –6.396 | SINFONI |
Notes.
The first block is reproduced from Brown et al. (2010) with the corrected values for the dates (see text). The second bloc corresponds to our appulse observation on 2010 February 23.
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