**Table 4:** The length of the jet at different epochs and in both H $_{\rm\alpha }$ and [SII] filters computed as the distance between the extremes of contours on knots F₂ (or ``F-complex'' when there is a single contour for both F₂ and F knots) and knot D.
Filter	Year	$\Delta t^{*}$	Length	Rate of change	Rate of change@150 pc		v error
		days	arcsec	arcsec/yr	AU/yr	km s^-1	km s^-1
H $_{\rm\alpha }$	1996	0	9.53	-	-	-	-
H $_{\rm\alpha }$	1998	771	9.74	0.0994	15	71	34
H $_{\rm\alpha }$	2005	2504	10.27	0.0773	12	55	10
${\rm [SII]}$	1996	0	9.76	-	-	-	-
${\rm [SII]}$	1998	771	10.02	0.1231	18	88	34
${\rm [SII]}$	2005	2505	10.19	0.0248	4	18	10

^* Number of days between successive epochs.

Source LaTeX | All tables | In the text