Wp/kri/NGC 5557

NGC 5557 na wan ɛliptik galɛksi we de na di kɔnstɛlɛshɔn we dɛn kɔl Boötes. Na Wiliam Ɛshɛl bin fɛn am pan May 1, 1785.[4] di distans to NGC 5557 dεn nכ no gud gud wan, bכt dεn εstimat se i de lεk 127 miliכn layt-ia (38.8 megaparsecs) away.[3] NGC 5557 na kwik masiv, wit K-band absכlut magnitud we na −24.8, εn na slo rotator,[3] we sho se i gεt mas tru dray mεrjεr (galaksi mεrjεr involv gεlεksi signifyant כmכnt כf gas).[5] Bɔt i gɛt fayn taydal tel na in ist, ɛn i gɛt mɔ kɔmpleks strɔkchɔ na di wɛst. dis strכkchכ, if dεn fכnshכn se i kכnekt to NGC 5557, i go bi wan pan di big wan dεm we de rawnd wan galeksi, we de span bכt 1.1 miliכn layt-ia (350,000 parsecs).[3] dis filamentary strכkchכ de sho se NGC 5557 kin fכm frכm wan mכr gas-rich galaksi mεrj wan tu bilyan ia bifo.[3] Dis min se di galaksi we dɛn jɔyn go nid fɔ gɛt lɔw impak paramita.[5] NGC 5557 na pat pan wan galɛksi grup,[3][4] ɛn na di big wan pan dis kayn galɛksi na di grup bay fa.[3] rawnd di galɛksi nia di ista filament, sɔm smɔl smɔl blush tin dɛn de, we sɔntɛm na taydal dwɔf galɛksi.[3] tu supanova dεn dכn si na NGC 5557: SN 1996aa (tayp Ia, mag. 17),[6] εn SN 2013gn (tayp Ia, mag. 15.3).[7]