Table 1
Projected and deprojected ring parameters.
| This work | IRDIS H (Milli et al. 2017) | ||
|---|---|---|---|
| Projected ellipse | a′(mas) | 1073 ± 4 | 1064 ± 6 |
| b′(mas) | 260 ± 7 | 252 ± 4 | |
| Δα(mas) | − 6 ± 4 | − 4 ± 4 | |
| Δδ(mas) | − 27 ± 4 | − 28 ± 5 | |
| PA(°) | 27.9 ± 0.2 | 27.69 ± 0.26 | |
| Deprojected ellipse | a(mas) | 1076 ± 6 | 1066 ± 6 |
| e | 0.072 ± 0.037 | 0.070 ± 0.011 | |
| i(°) (a) | 76.0 ± 1.2 | 76.33 ± 0.24 | |
| ω(°) | −74.2 ± 11.9 | −72.44 ± 5.10 | |
| Ω(°) (a) | 27.9 ± 0.6 | 27.71 ± 0.25 | |
Notes. The error is given at a 3σ level and contains only the statistical error from the fit and no systematic error from the true north or star registration. (a) We followed the previous conventions used for this system with an ascending node ~ 28° (measured from north, anti-clockwise) for an inclination of ~76° (0° means pole-on) butas noted in Kennedy et al. (2018), the west side is closer to Earth, and therefore the inclination should be strictly ~ 104° (or the node should be ~208° and the inclination retained).
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