VLSR Calculator Version 1.0
The algorithm for calculating VLSR was written by
M. A. Gordon and can be found in Methods of Experimental Physics,
Volume 12, Part C: Radio Observations , Ed. M. L. Meeks.
The B in the epoch field refers to the FK4 system (Besselian), J
refers to the FK5 system (Julian). The quoted accuracy is
0.02 km s-1.