(Q78196681)
Statements
0.8212
5±4 milliarcsecond per year
3±4 milliarcsecond per year
18.136±0.03
1 reference
18.712±0.019
1 reference
16.614±0.116
16.595±0.227
15.698±0.183
18.85
18.52
18.243±0.007
1 reference
18.156±0.007
1 reference
18.244±0.01
1 reference
48,000,000 centimetre per square second