Table 4.
Parameters of the distribution in positions (in pc) and in velocities (in km s−1) of the 26 bona fide kinematic members of β Pic in the present (t = 0 Myr).
| Positions | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| X | Y | Z | σobs, X | σobs, Y | σobs, Z | σerr, X | σerr, Y | σerr, Z | σint, X | σint, Y | σint, Z |
| 47.49 | −7.89 | −17.92 | 16.04 | 13.18 | 7.44 | 0.11 | 0.04 | 0.05 | 15.93 | 13.14 | 7.39 |
| Velocities | |||||||||||
| U | V | W | σobs, U | σobs, V | σobs, W | σerr, U | σerr, V | σerr, W | σint, U | σint, V | σint, W |
| −8.74 | −16.16 | −9.98 | 1.49 | 0.54 | 0.70 | 0.24 | 0.11 | 0.11 | 1.25 | 0.43 | 0.59 |
Notes. Columns indicate: (1–3) central location of the distribution, (4–6) robust standard deviation, (7–9) median errors, and (10–12) a rough estimate of the intrinsic dispersion, computed as 
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