(Q78200051)
Statements
0.6680
1±3 milliarcsecond per year
−1±3 milliarcsecond per year
18.811±0.019
1 reference
18.94
18.85
18.66±0.01
18.69±0.03
18.489±0.008
1 reference
18.6±0.009
1 reference
245,000,000 centimetre per square second