Table 4
Proper motions.
| Object | Reference | μαcosδ | μ δ | ||
| [mas/yr] | [mas/yr] | ||||
|
|
|||||
| DI Cha | Hipparcos | ||||
| (new) (1) | −24.61 ± 1.84 | 3.45 ± 1.54 | |||
| Tycho-2 (2) | −23.6 ± 3.0 | 6.0 ± 2.8 | |||
|
|
|||||
| used: | |||||
| UCAC 3 (3) | −15.8 ± 1.6 | −5.1 ± 1.7 | |||
|
|
|||||
| Sz 22 | UCAC 3 (3) | −26.7 ± 5.7 | 13.7 ± 7.7 | ||
| CHXR 32 | UCAC 3 (3) | −2.1 ± 5.6 | −4.4 ± 5.5 | ||
| PPMX (4) | −27.2 ± 3.8 | 14.14 ± 3.8 | |||
|
|
|||||
| used: | |||||
| UCAC 2 (5) | −15.9 ± 3.7 | 7.7 ± 3.4 | |||
|
|
|||||
| Cha Hα 5 | PSSPMC (6) | −18 ± 13 | 11 ± 13 | ||
| SSS-FORS1 (7) | −31.8 ± 21.7 | 12.5 ± 21.7 | |||
| SSS-SofI (7) | −29.6 ± 11.8 | 9.7 ± 11.8 | |||
|
|
|||||
| Weighted mean | −25.4 ± 8.1 | 10.6 ± 8.1 | |||
|
|
|||||
| Median Cha I | Luhmana (8) | −21 ± ~1 | 2 ± ~1 | ||
Notes. Only independent sources with individual error bars for the targets were considered.
References. (1) van Leeuwen (2007); (2) Høg et al. (2000); (3) Zacharias et al. (2010); (4) Röser et al. (2008); (5) Zacharias et al. (2004); (6) Ducourant et al. (2005); (7) own data (here) and Hambly et al. (2001); (8) Luhman et al. (2008).
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