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AM 1957-471

It turns out that there are very few groups that are classified as interacting quartets. Most of the ones that are outstanding are shown on pages 4.1 and 4.2. It is surprising that a high percentage of them have a linear arrangement. As in Category 3, the phenomenon is probably related to the chaining in Category 17 and diametric companions in Category 8. In AM 0218-321 one faint arm of the spiral encircles the companion immediately to the north. This object is also illustrated under Category 17.

AM 0018-485 picture AM 1957-471 picture AM 1322-300 picture
AM 0556-425 picture AM 0218-321 picture AM 2147-490 picture
AM 2115-574 picture

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