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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=921, n_Group=L
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ColumnValue  Explain   (UCD)
_RAJ200012 54 53.800 "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)
_DEJ2000-11 13 56.00 "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)
_RAB195012 52 16.996 "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)
_DEB1950-10 57 41.20 "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)
_Glon304.298322 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+51.630350 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)
921recno 921  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
n_GroupL  L for Low-density-contrast group, or H for High-density-contrast group (meta.id.part;meta.main)

Group 921  Group number (Note 1)   (meta.id;meta.main)
RAJ200012 54 53.8 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000-11 13 56 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 80  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist 62.01 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 4252 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 443.0 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 3.31 Mpc Projected virial radius (phys.size.radius)
logM14.852 [solMass] Log of the virial mass (phys.mass)
logMp15.184 [solMass] Log of the projected mass (phys.mass)
logM/L 2.263 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 200 arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
b/a 0.38   Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
PA178 deg Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
LDC    LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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