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Table 4
Projected and deprojected ring parameters.
| Type of fit | Parameter | IRDIS H | IRDIS H2 | IRDIS H3 | IFS |
|
|
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| Projected ellipse |
a′(mas) | 1064 ± 6 | 1064 ± 8 | 1066 ± 8 | 1059 ± 4 |
| b′(mas) | 252 ± 4 | 249 ± 3 | 248 ± 3 | 249 ± 2 | |
| Δα(mas) | −4 ± 4 | −4 ± 4 | −3 ± 4 | −7 ± 2 | |
| Δδ(mas) | −28 ± 5 | −23 ± 6 | −23 ± 6 | −14 ± 4 | |
| PA(°) | 27.69 ± 0.26 | 27.00 ± 0.25 | 26.99 ± 0.27 | 26.81 ± 0.16 | |
|
|
|||||
| Deprojected ellipse |
a(mas) | 1066 ± 6 | 1064 ± 8 | 1067 ± 8 | 1061 ± 5 |
| e | 0.070 ± 0.011 | 0.059 ± 0.010 | 0.057 ± 0.011 | 0.052 ± 0.007 | |
| i(°) | 76.33 ± 0.24 | 76.48 ± 0.24 | 76.55 ± 0.24 | 76.42 ± 0.15 | |
| ω(°) | −72.44 ± 5.10 | −73.03 ± 6.91 | −71.60 ± 7.72 | −80.15 ± 4.44 | |
| Ω(°) | 27.71 ± 0.25 | 27.02 ± 0.25 | 27.02 ± 0.27 | 26.82 ± 0.16 | |
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.
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