On Feb 26, 6:54*pm, Bill Owen wrote:
After you copy the star data from DVD, you'll need to run a Python
script athttp://ad.usno.navy.mil/ucac/modifs.py
to correct a few thousand erroneous proper motions. *Seehttp://ad.usno.navy.mil/ucac/readme_fixHPMfor details.

I also know that Vega is missing from UCAC4. *It might not be the only one.

-- Bill Owen

You know Bill,the so-called JPL ephemeris time argument is equivalent
to the analemma argument as it tries to work timekeeping averages back
into cyclical dynamical motions of the Earth without realizing that it
is working off the 1461 day system formatted as 365/366 days.The
analemma or the wandering Sun had no substance in terms of the daily
and orbital motions of the Earth even if that misguided perception
lasted for a century and a half but the application of stellar
circumpolar motion to the Earth's dynamics is even more contrived and
convoluted than the analemma.

The reliance on mistakes made centuries ago is truly bewildering,the
objective is to retain the right ascension ideology in all its forms
as a convenience for civil timekeeping,spacecraft
trajectories,predictive astronomy within the calendar format but free
up information that cuts the Earth's daily and orbital motions loose
from the hideous rotating celestial sphere geometry that infects
everything to do with cause and effect.

What is so difficult for a man receiving a salary to reject the
trajectory of reasoning which ties the 24 hour AM/PM system to the Lat/
Long system instead of this utterly irritating attempts to make
planetary dynamics fit into references that do not and never have
worked.