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NGC 1680



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Radial velocities and spectrophotometric properties of southern binary galaxies
We present spectrophotometry of a sample of 26 Southern binary galaxies17 pairs were confirmed to be physically associated with typicalseparation of 136 h^{-1} kpc. Pairs with velocity difference Delta v>= 600 km s^{-1} are probably not physically bound. A comparison withfield galaxies suggests that galaxies in pairs tend to have a youngerpopulation probably stimulated by tidal interaction. No correlationbetween the young population and projected separation was found. Table 1is also available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr( or via http://cdsweb.u-strasbg.fr/Abs tract.html

The Catalog of Southern Ringed Galaxies
The Catalog of Southern Ringed Galaxies (CSRG) is a comprehensivecompilation of diameters, axis ratios, relative bar position angles, andmorphologies of inner and outer rings, pseudorings, and lenses in 3692galaxies south of declination -17 deg. The purpose of the catalog is toevaluate the idea that these ring phenomena are related to orbitalresonances with a bar or oval in galaxy potentials. The catalog is basedon visual inspection of most of the 606 fields of the Science ResearchCouncil (SRC) IIIa-J southern sky survey, with the ESO-B, ESO-R, andPalomar Sky surveys used as auxiliaries when needed for overexposed coreregions. The catalog is most complete for SRC fields 1-303 (mostly southof declination -42 deg). In addition to ringed galaxies, a list of 859mostly nonringed galaxies intended for comparison with other catalogs isprovided. Other findings from the CSRG that are not based on statisticsare the identification of intrinsic bar/ring misalignment; bars whichunderfill inner rings; dimpling of R'1pseudorings; pointy, rectangular, or hexagonal inner or outer ringshapes; a peculiar polar-ring-related system; and other extreme examplesof spiral structure and ring morphology.

Southern Galaxy Catalogue.
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Observation and Astrometry data

Right ascension:04h48m33.90s
Aparent dimensions:1.349′ × 0.575′

Catalogs and designations:
Proper Names   (Edit)
NGC 2000.0NGC 1680

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