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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=741, n_Group=H
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200012 56 09.500 "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)
_DEJ2000-13 37 44.00 "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 53 31.932 "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)
_DEB1950-13 21 30.47 "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)
_Glon304.688203 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+49.226762 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)
2345recno 2345  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 741  Group number (Note 1)   (meta.id;meta.main)
RAJ200012 56 09.5 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000-13 37 44 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
Nm 27  Number of members in Group (Note 2)   (meta.number)
NmS 0  Number of simulated members in Group (meta.number)
Dist 65.56 Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
HV 4510 km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
sigma 319.2 km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
Rp 1.34 Mpc Projected virial radius (phys.size.radius)
logM14.175 [solMass] Log of the virial mass (phys.mass)
logMp14.529 [solMass] Log of the projected mass (phys.mass)
logM/L 1.967 [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
a 74 arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
b/a 0.57   Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
PA132 deg Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
LDC 921   LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  
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