DATA
Proper-Motion:
Ciel:
Proper motion in right ascension: 91 [mas/y]
Proper motion in declination: 10 [mas/y]
=>
Distance to target:
Ciel: -59.000 years
New DATA from:
Simbad.u-strasbg.fr:
Proper motions mas/yr: 92.112 10.221
=>
91^2 + 10^2 = sqr (8381) = 91,547801721286568531262078356186
and ...
92,112^2 + 10,221^2 = sqr (8589,089385) = 92,677340191656342118083268930227
and ...
91,547801721286568531262078356186 / 92,677340191656342118083268930227
=
0,98781213975245844482015798860879
=>
-59.000 * 0,98781213975245844482015798860879
=
-58281 years