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NGC 7033


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The UZC-SSRS2 Group Catalog
We apply a friends-of-friends algorithm to the combined Updated ZwickyCatalog and Southern Sky Redshift Survey to construct a catalog of 1168groups of galaxies; 411 of these groups have five or more members withinthe redshift survey. The group catalog covers 4.69 sr, and all groupsexceed the number density contrast threshold, δρ/ρ=80. Wedemonstrate that the groups catalog is homogeneous across the twounderlying redshift surveys; the catalog of groups and their membersthus provides a basis for other statistical studies of the large-scaledistribution of groups and their physical properties. The medianphysical properties of the groups are similar to those for groupsderived from independent surveys, including the ESO Key Programme andthe Las Campanas Redshift Survey. We include tables of groups and theirmembers.

Corrections and additions to the third reference catalogue of bright galaxies
List of corrections and additions to the Third Reference Catalogue ofBright Galaxies (RC3) are given. The corrected version of the catalogue(RC3.9b), dated April 1994, is currently available through the nationaldata centers.

The environment and the origin of twisting in early-type galaxies
The effects of random collisions in groups or clusters on thedevelopment of isophotal twisting (IT) in early-type galaxies areinvestigated. The maximum ellipticity and IT in each galaxy is estimatedon the basis of published observational data and correlated with thegalaxy number density. The proportions of S0 and elliptical (E) galaxieswith IT are found to be independent of local environmental density. CCDobservations of six isolated nonhierarchical pairs containing early-typegalaxies, obtained at the Cassegrain focus of the 1.82-m telescope atAsiago Observatory, are then used to study tidal interactions ingalaxies with normal morphology; the data are presented in tables andgraphs and examined in detail. It is shown that mutual tidalperturbations alone cannot explain the IT phenomena: S0 galaxies areless twisted than Es in all density regimes, and the proportion oftwisted Es in E+E pairs is similar to that in the overall sample.

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Observation and Astrometry data

Constellation:Πήγασος
Right ascension:21h09m36.20s
Declination:+15°07'29.0"
Aparent dimensions:0.871′ × 0.589′

Catalogs and designations:
Proper Names   (Edit)
NGC 2000.0NGC 7033
HYPERLEDA-IPGC 66228

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