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Table 3

Parameters for the jet precession.

ψ α λ ϕ0 i
(1) (2) (3) (4) (5)
70°.1+0°.13 0°.06±0°.003 7″.2±0″.3 50°.1+10°.6 8.0 (†)

Notes. Column 1: the position angle of the jet symmetry axis in the plane of the sky. Columns 2 and 3: the amplitude and wave scale of the precession. Column 4: the initial phase at the location of MM1. Column 5: the inclination angle of the jet to the plane of the sky.(†) The inclination i is fixed to 8° according to the calculations using water masers (see Sect. 4). This is because the precession fitting is relatively insensitive to the inclination (e.g. Wu et al. 2009).

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