Some researchers have considered that NGC 3256 and NGC 3263 form two different groups but they are difficult to distinguish from each other spatially and two different group-finding algorithms applied to the same data catalogued the same galaxies in different groups.
一些研究人員認為NGC 3256和NGC 3263分別在不同的星系群中形成，但兩者似乎很難在空間中加以區分，而且搜尋兩個不同星系群的演算法也被應用於在同一批資料中尋找不同星系群中相同類型的星系。