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Table 2.

Best-fit parameters from the simultaneous fitting of the apparent velocity, position angle, and the core I flux density.

Parameter Notation Best-fit values (all 8 parameters) Best-fit parameters for fixed ξ = 1.5 Best-fit parameters for fixed ξ = 3.0
Intrinsic jet flux density Sjet 0.25 ± 3.66 Jy 0.06 ± 0.14 Jy 0.01 ± 0.03 Jy
Boosting exponent ξ −0.6 ± 6.9 1.5 3.0
Reference epoch tref 1996.7 ± 24.9 2022.2 ± 17.7 1991.5 ± 21.0
Precession period 9.9 ± 3.4 yr 10.3 ± 1.0 yr 10.2 ± 1.1 yr
Lorentz factor γL
Half-opening angle Ω 58.8 ° ±46.8° 16.6 ° ±42.6° 19.5 ° ±31.9°
Viewing angle ϕ0 22.6 ° ±57.8° 8.4 ° ±32.9° 10.3 ° ±24.3°
Position angle η0 79.3 ° ±103.4° −87.5 ° ±87.9° −93.7 ° ±94.3°

Goodness of fit 1.37 1.65 1.78

Notes. Column 1 lists the parameter names, Col. 2 the notation used, and Col. 3 the best-fit values.

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