(1979 catalog of 4000 stars with high proper motion)
The Luyten Half-second Catalog (LHS) is
a catalog of about 4000 stars
with a proper motion greater than half a second per year,
last published in 1979 by Willem Jacob Luyten.
It was produced from the Palomar Observatory Sky Survey (POSS) and other plates.
The LHS is a successor to Luyten's 1955 Luyten Five Tenths Catalog,
but the identification numbers are not compatible.
The Revised Luyten Half-second Catalog is
a 2002 catalog of the same set of stars,
updating and correcting the data, such
as including J2000coordinates.