Table 1

Proper-motion errors accumulated over t = 25 yr as function of declination due to truncation of the full model up to and including first, second, and third-order terms in time for an “extreme”, i.e., nearby, fast-moving star: ϖ = 500 mas (r = 2 pc), μ_α = μ_δ = 2000 mas yr^-1, and v_r = 50 km s^-1.

							Full model
δ [°]	μ α	μ δ	μ α	μ δ	μ α	μ δ	μ α	μ δ
	[mas yr-1]		[μas yr-1]		[nas yr-1]		[nas yr-1]
85	4.3	−4.1	6.1	5.8	−5.1	6.7	0.0	0.0
75	0.5	−2.2	1.4	0.1	0.0	0.6	0.0	0.0
60	−0.4	−1.7	0.6	−0.2	0.0	0.1	0.0	0.0
45	−0.8	−1.5	0.3	−0.2	0.0	0.0	0.0	0.0
30	−1.0	−1.4	0.1	−0.2	0.0	0.0	0.0	0.0
15	−1.1	−1.3	0.0	−0.1	0.0	0.1	0.0	0.0
0	−1.3	−1.3	0.0	−0.1	0.0	0.1	0.0	0.0
−15	−1.4	−1.2	0.1	−0.1	0.0	0.1	0.0	0.0
−30	−1.6	−1.1	0.2	0.0	0.0	0.1	0.0	0.0
−45	−1.8	−1.0	0.3	0.1	0.0	0.0	0.0	0.0
−60	−2.1	−0.9	0.5	0.3	0.0	0.0	0.0	0.0
−75	−3.1	−0.4	0.9	1.3	0.3	0.3	0.0	0.0
−85	−6.8	1.5	1.0	9.3	8.2	3.0	0.0	0.0