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Table 2
Orbital velocity and twist separation measurements.
| Band | S1 velocity (° yr−1) | S2 velocity (° yr−1) | S3 velocity (° yr−1) | Twist velocity (° yr−1) | Twist separation (″) |
|---|---|---|---|---|---|
| YJH | 0.83 ± 0.14 | 0.69 ± 0.22 | / | 1.05 ± 0.27 | 0.415 ± 0.006 |
| K1 | 0.80 ± 0.12 | 0.75 ± 0.13 | 0.71 ± 0.22 | 0.75 ± 0.15 | 0.433 ± 0.025 |
| K2 | 0.94 ± 0.12 | 0.85 ± 0.21 | 0.71 ± 0.19 | 0.70 ± 0.19 | 0.427 ± 0.014 |
| Lp | 0.83 ± 0.32 | 0.80 ± 0.29 | 1.18 ± 0.37 | 1.18 ± 0.51 | 0.443 ± 0.022 |
| 0.86 ± 0.07 | 0.77 ± 0.09 | 0.75 ± 0.14 | 0.80 ± 0.11 | 0.419 ± 0.005 |
Notes. The columns provide, in order, the orbital velocity measurements for all spiral arms, S1, S2, and S3, as well the twist velocity. The last column is the measured angular separations of the twist. The last line is the weighted average.
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