Lyons Groups of Galaxies (orLGG) is anastronomical catalog of nearbygroups of galaxies complete to a limitingapparent magnitudeB0=14.0 with arecession velocity smaller than 5,500 km/s. The catalogue was obtained from theLyon-Meudon Extragalactic Database. Two methods were used in group construction: a percolation method derived from Huchra and Geller[1] and a hierarchical method initiated byR. Brent Tully.[2] The catalog is a synthesized version of the two results.
The LGG includes 485 groups and 3,933 member galaxies.
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