| Column | Description |
|---|
| pgc | PGC number |
| Kc | K_s corrected for SFD galactic extinction |
| Vhel | Heliocentric velocity |
| e_Vh | Error in velocity |
| src_V | Source of velocity: see ZCAT |
| T | Morphological type: see ZCAT/2MASS |
| D1 | Major axis diameter from UGC, ESO, RC2 |
| D2 | Minor axis diameter from UGC, ESO, RC2 |
| J-K | 2MASS J-K color |
| H-K | 2MASS H-K color |
| b/a | Minor/Major axial ratio: D2/D1 |
| Glon | Galactic longitude |
| Glat | Galactic latitude |
| Name | Alternative name; NZ: no velocity |
| LDC | Crook et al. Low Density Contrast (LDC) group number |
| RAldc | J2000 Right Ascension of LDC group |
| DEldc | J2000 Declination of LDC group |
| Nldc | Number of members in LDC group |
| Nsiml | Number of simulated members in LDC group |
| Dldc | Mean (corrected) group distance |
| Vldc | Mean heliocentric group velocity |
| SIGldc | Line-of-sight group velocity dispersion |
| Rldc | Projected virial radius |
| logMVldc | Log of the virial mass |
| logMPldc | Log of the projected mass |
| logM/Lldc | Log of the projected mass-to-light ratio |
| aldc | Semimajor axis of ellipse fit to group at 75th percentile |
| b/aldc | Axis ratio of group ellipse fit |
| PAldc | Position angle of group ellipse fit; from N thru E |
| HDC | Crook et al. High Density Contrast (HDC) group number |
| RAhdc | J2000 Right Ascension of HDC group |
| DEhdc | J2000 Declination of HDC group |
| Nhdc | Number of members in HDC group |
| Nsimh | Number of simulated members in HDC group |
| Dhdc | Mean (corrected) group distance |
| Vhdc | Mean heliocentric group velocity |
| SIGhdc | Line-of-sight group velocity dispersion |
| Rhdc | Projected virial radius |
| logMVhdc | Log of the virial mass |
| logMPhdc | Log of the projected mass |
| logM/Lhdc | Log of the projected mass-to-light ratio |
| ahdc | Semimajor axis of ellipse fit to group at 75th percentile |
| b/ahdc | Axis ratio of group ellipse fit |
| PAhdc | Position angle of group ellipse fit; from N thru E |
| INldc | LDC group that includes all members of this HDC group |
| al2000 | Right Ascention (J2000) |
| de2000 | Declination (J2000) |