Roger W. Sinnott and Michael A. C. Perryman, Millennium Star Atlas
Definition
Roger W. Sinnott and Michael A. C. Perryman, Millennium Star Atlas (Sky Publishing / European Space Agency, 1997) is an astrological source represented here through cited material on fixed stars, tycho, hipparcos, catalog completeness, and catalog provenance.

What this work covers
The cited material covers fixed stars, tycho, hipparcos, catalog completeness, and catalog provenance.
The atlas introduction frames plotted star selection, positions, brightness, and selected proper-motion, distance, and variability data as grounded in Tycho and Hipparcos catalogue material.
The atlas describes Tycho sampling as strong toward the bright end but with a frayed faint boundary, so atlas membership should not be treated as a perfectly sharp magnitude cutoff.
The atlas photometry window supports a provenance note: plotted brightness follows Johnson V-style photometry, with Tycho-derived values transformed by Hipparcos project methods and bright-star fields improved from Hipparcos data.
Scope and limitations
This overview is limited to the cited portions. It does not stand in for the complete work, reproduce source passages, or make every documented technique a universal chart interpretation.