Table 3: Proper motion $(\mu_{\alpha}\cos{\delta},~\mu_{\delta})$ solutions [mas/yr].
# SSSPM 1930 SSSPM 2003
1 $-24.1 \pm 18.4,~ -853.7 \pm ~~4.8$ $-32.3 \pm 11.7,~ -882.8 \pm 23.2$
2 $-11.0 \pm ~~8.1,~ -883.5 \pm 17.9$ $-19.4 \pm ~~5.4,~ -879.7 \pm 25.8$
3 $-10.5 \pm ~~8.0,~ -871.8 \pm ~~5.8$ $-19.3 \pm ~~5.0,~ -859.2 \pm 11.7$
4 $-16.4 \pm ~~3.1,~ -861.6 \pm ~~2.7$ $-18.0 \pm ~~7.4,~ -855.2 \pm ~~3.8$
Notes. #1 Based on the original 4 SSS epochs for SSSPM 1930 and 3 SSS epochs (without BJ) for SSSPM 2003; #2 with all the uncorrected positions from Table 1 (8 epochs) and Table 2 (7 epochs), respectively; #3 after correcting two DENIS epochs; #4 finally adopted run: with corrected DENIS epochs and after transforming all SSS and DENIS positions to the 2MASS system.

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