On 2009-11-21, HW@..(Henry Wilson DSc). HW@ wrote:
Note, 'velocity' is true radial velocity towards Earth. It includes pitch. I
haven't bothered to set either distance or velocity at any measured value
because I cannot find reliable figures. Hipparcos and Tycho give different
values for parallax. 1.9 and 3.1 mas respectively.


I usually ignore "Henry"'s blathering, but this note somehow made it
past my kill filter. Henry is talking out his ass again, the Tycho
catalog does not include parallax.