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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=867, n_Group=!=L
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ColumnValue  Explain   (UCD)
_RAJ200014 18 45.000 "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+07 20 57.00 "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)
_RAB195014 16 16.166 "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+07 34 43.95 "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)
_Glon353.249003 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+61.368546 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)
2471recno 2471  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 867  Group number (Note 1)   (meta.id;meta.main)
RAJ200014 18 45.0 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+07 20 57 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 6  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist108.84 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 7481 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 259.9 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 0.93 Mpc Projected virial radius (phys.size.radius)
logM13.837 [solMass] Log of the virial mass (phys.mass)
logMp13.977 [solMass] Log of the projected mass (phys.mass)
logM/L 1.554 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 21 arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
b/a 0.26   Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
PA143 deg Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
LDC1042   LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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