Table 1: Angular rates of rotation and internal errors obtained from the comparison of FK5 and Hipparcos proper motions for different sets of stars (d stands for stellar distance).
Author Number $\omega_x$ $\omega_y$ $\omega_z$

of stars [mas/yr] [mas/yr] [mas/yr]

Mignard & Froeschlé 1233 $-0.30\pm0.10$ $0.60\pm0.10$ $0.70\pm0.10$

(Mignard & Froeschlé 2000)

Schwan 1151 $-0.34\pm0.08$ $0.74\pm0.08$ $0.89\pm0.08$

(Schwan 2001)

Walter & Hering 1151 $-0.30\pm0.07$ $0.65\pm0.07$ $0.77\pm0.08$

(this paper)

529 $-0.39\pm0.10$ $0.58\pm0.11$ $0.62\pm0.12$

(d>100 pc)

208 $-0.61\pm0.16$ $0.70\pm0.18$ $0.59\pm0.19$

(d>200 pc)

**Table 1:** Angular rates of rotation and internal errors obtained from the comparison of FK5 and Hipparcos proper motions for different sets of stars (d stands for stellar distance).
Author	Number	$\omega_x$	$\omega_y$	$\omega_z$
	of stars	[mas/yr]	[mas/yr]	[mas/yr]
Mignard & Froeschlé	1233	$-0.30\pm0.10$	$0.60\pm0.10$	$0.70\pm0.10$
(Mignard & Froeschlé 2000)
Schwan	1151	$-0.34\pm0.08$	$0.74\pm0.08$	$0.89\pm0.08$
(Schwan 2001)
Walter & Hering	1151	$-0.30\pm0.07$	$0.65\pm0.07$	$0.77\pm0.08$
(this paper)
	529	$-0.39\pm0.10$	$0.58\pm0.11$	$0.62\pm0.12$
	(d>100 pc)
	208	$-0.61\pm0.16$	$0.70\pm0.18$	$0.59\pm0.19$
	(d>200 pc)

Source LaTeX | All tables | In the text

	1 Introduction
	2 Formulation of the problem
	3 Assessment of the spin matrix
	4 Conclusions
	References