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Table 7
UCAC4 mean and weighted mean proper motions for the confirmed and probable members of the Cha I and II moving groups.
| Group | Arithmetic means | Weighted means | ||||
| ⟨ μαcosδ ⟩ | ⟨ μδ ⟩ | ⟨ μ ⟩ | ⟨ μαcosδ ⟩ | ⟨ μδ ⟩ | ⟨ μ ⟩ | |
| (mas/yr) | (mas/yr) | (mas/yr) | (mas/yr) | (mas/yr) | (mas/yr) | |
|
|
||||||
| Cha I confirmed members | −19.2 ± 1.8 | +1.5 ± 2.1 | 19.4 ± 1.7 | −19.2 ± 0.2 | +1.7 ± 0.3 | 19.60 ± 0.15 |
| Cha I probable members | −18.8 ± 2.8 | +2.3 ± 2.0 | 19.0 ± 2.9 | −19.0 ± 0.3 | +2.5 ± 0.3 | 19.5 ± 0.3 |
| Cha II confirmed members | −21.6 ± 3.7 | −7.0 ± 2.8 | 22.9 ± 3.6 | −21.0 ± 0.7 | −7.1 ± 0.8 | 22.4 ± 0.9 |
| Cha II probable membera | −23.0 ± 4.6 | −8.2 ± 4.5 | 24.4 ± 5.8 | −23.0 ± 4.6 | −8.2 ± 4.5 | 24.4 ± 5.8 |
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