Patrick I agree that it should be fine for use in a planetarium program. For astrometry I think I will stay with UCAC2 and B1.0 until I find out more. Folks that are going to engage in data mining might want to read Brian Skiff's comments and take appropriate precautions.
Jim Jones Patrick Chevalley wrote: > Hi, > > >> However, there are some issues raising their ugly heads regarding the >> UCAC3. Don't throw out your copies of UCAC2 yet. (Check out recent >> discussion on MPL). >> > > I read that but our use of the catalog is not the same. > Maybe this catalog contain 3% of various error but we use the GSC with 40% > fake and duplicate to make chart up to now :-) > > It look like many error are on the bright side of the catalog. > I like Bill Gray idea to filter out the UCAC3 stars that have the Tycho2 > flag. > This solve most of this problems, solve bright stars completeness in UCAC3 > and also give no duplicate plot. > This require to always use Tycho2 and UCAC3 together. This can be the best > solution for charting. > > The only problem in this case is the index completeness but it can be build > on a separate run that include all the stars. > > Patrick > > > > > ------------------------------------ > > Yahoo! Groups Links > > > > >
