We present the construction and describe the properties of the Padova-Millennium Galaxy and Group Catalogue ( PM2GC ) , a galaxy catalogue representative of the general field population in the local Universe .
We characterize galaxy environments by identifying galaxy groups at 0.04 \leq z \leq 0.1 with a Friends-of-Friends ( FoF ) algorithm using a complete sample of 3210 galaxies brighter than M _ { B } = -18.7 taken from the Millennium Galaxy Catalogue ( MGC , Liske et al .
( 42 ) ) , a 38 deg ^ { 2 } photometric and spectroscopic equatorial survey .
We identified 176 groups with at least three members , comprising in total 1057 galaxies and representing \sim 43 per cent of the general field population in that redshift range .
The median redshift and velocity dispersion of our groups are 0.0823 and 192 km s ^ { -1 } , respectively .
88 per cent of the groups have fewer than ten members , and 63 per cent have fewer than five members .
Non-group galaxies were subdivided into “ binary ” systems of two bright close companions , and “ single ” galaxies with no companion , in order to identify different environments useful for future scientific analysis .
We performed a detailed comparison with the 2PIGG catalog to validate the effectiveness of our method and the robustness of our results .
Galaxy stellar masses are computed for all PM2GC galaxies , and found to be in good agreement with Sloan Digital Survey Data Release 7 ( SDSS-DR7 ) mass estimates .
The catalogues of PM2GC groups , group properties and galaxy properties in all environments are publicly available on the World Wide Web .