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Table 1.
Parameters used in the final step of the clustering algorithm (α, δ, μα cos δ, μδ, ϖ, vr) and some derived quantities (r – the radius enclosing 50% of the stars, σv – the dispersion of the radial velocity, and age).
| Cluster | α | δ | r | μα cos δ | μδ | ϖ | vr | σv | Age | No. of stars |
|---|---|---|---|---|---|---|---|---|---|---|
| (°) | (°) | (°) | (mas yr−1) | (mas yr−1) | (mas) | (km s−1) | (km s−1) | (Myr) | (with vr) | |
| ASCC 16 | 81.171 | 1.386 | 0.87 | 1.33 | −0.23 | 2.84 | 19.72 | 6.45 | 13.0 ± 1.3 | 683 (50) |
| ASCC 18 | 81.569 | 0.427 | 0.74 | 0.20 | 1.16 | 2.41 | 27.19 | 5.77 | 12.75 ± 1.27 | 148 (11) |
| ASCC 20 | 82.135 | 1.792 | 0.80 | −0.56 | 0.67 | 2.69 | 27.70 | 7.66 | 21.25 ± 2.12 | 237 (41) |
| ASCC 21 | 82.040 | 3.530 | 0.54 | 1.40 | −0.55 | 2.87 | 19.12 | 5.98 | 11.0 ± 1.1 | 266 (46) |
| ASCC 21a | 82.904 | 2.297 | 0.72 | 1.70 | −0.65 | 2.80 | 19.50 | 7.38 | 12.75 ± 1.27 | 282 (39) |
Notes. Number of stars gives the total number and the number with known radial velocities in the brackets.
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