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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=135, n_Group=H
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200002 22 40.200 "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)
_DEJ2000-20 55 23.00 "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)
_RAB195002 20 21.317 "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)
_DEB1950-21 09 00.15 "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)
_Glon201.261858 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-68.301256 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)
1739recno 1739  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 135  Group number (Note 1)   (meta.id;meta.main)
RAJ200002 22 40.2 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000-20 55 23 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 3  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist 20.96 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 1573 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 93.4 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 0.30 Mpc Projected virial radius (phys.size.radius)
logM12.456 [solMass] Log of the virial mass (phys.mass)
logMp12.438 [solMass] Log of the projected mass (phys.mass)
logM/L 1.399 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 20 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 161   LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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