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J/ApJ/655/790/groups Groups of galaxies in 2MASS survey (Crook+, 2007)
Catalog of Groups in the 2MASS Redshift Survey (Low-density-contrast + High-density-contrast, tables 6 and 7 of paper) (2865 rows)
  Group=51, n_Group=!=L
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ColumnValue  Explain   (UCD)
_RAJ200001 08 38.000 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000-45 43 25.00 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195001 06 24.222 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950-45 59 24.13 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon293.638104 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat-71.093082 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
1655recno 1655  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
n_GroupH  L for Low-density-contrast group, or H for High-density-contrast group (meta.id.part;meta.main)

Group 51  Group number (Note 1)   (meta.id;meta.main)
RAJ200001 08 38.0 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000-45 43 25 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 4  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist 98.71 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 7233 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 58.6 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 1.43 Mpc Projected virial radius (phys.size.radius)
logM12.732 [solMass] Log of the virial mass (phys.mass)
logMp12.776 [solMass] Log of the projected mass (phys.mass)
logM/L 0.442 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 25 arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
b/a    Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
PA  deg Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
LDC 63   LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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