Object name: HCG079
Designation(s): HCG079, SEYFERTS_SEXTET, NGC6027,
This was the most compact group of galaxies known when Seyfert discovered it in 1951. The group consists of only 5 rather than 6 galaxies like the name implies. 4 of them are about 200 million light-years away. The fifth, the small spiral to the east side under others, is well over 4 times as distant so not a member of the group. Three of the group appear to be interacting, the easternmost so distorted it was thought to be two galaxies giving rise to the 6 galaxy count. The extra galaxy is just a large plume, however. The group was first recorded by Édouard Stephan as one galaxy which went into the NGC as NGC 6027. The individual galaxies carry their own letter designation but that varies from catalog to catalog with some using lower case letters and others upper case. All have PGC numbers but again I find some disagreement as to which is which. A quick calculation shows the interacting galaxies occupying an area of space only slightly larger than our galaxy. I do find the southern blue galaxy odd. I suspect it isn't interacting nearly as strongly with the others, if at all.
Related Designation(s):2MASS J15591255+2045481, 2MASX J15591254+2045483, 2MASXi J1559125+204548, ASK 561978.0, CGCG 137-010, CGCG 137-010 NED01, CGCG 1557.0+2055, CGCG 1557.0+2055 NED01, CGPG 1557.0+2055, CGPG 1557.0+2055 NED04, HCG 079, HCG 079:[TTW2012] 05, HCG 079b, HCG079, IRAS 15570+2053, IRAS F15570+2053, KUG 1556+208, LDCE 1163 NED004, MCG +04-38-008, NGC 6027, NGC6027, NSA 098654, PGC 056575, RSCG 77, SDSS J155912.53+204548.0, SDSS J155912.53+204548.1, SDSS J155912.54+204548.1, Serpens Sextet, Serpens Sextet NED01, SEYFERTS SEXTET, SSTSL2 J155912.51+204548.1, UGC 10116, UGC 10116 NED01, USGC U739 NED02, UZC J155912.6+204550, VII Zw 631, VII Zw 631 NOTES04, VV 115, VV 115A NED01, [DKL2011] 25, [RPG97] 370, [TTL2012] 254737,