Earh is 50 kiloparsecs from the Large Magellic Cloud, 778 kiloParsecs from the Andromeda Galaxy. And 2 Megaparsecs from this newly discovered galaxy. Apparently. KKs is an isolated spheroidal galaxy-- not a satellite of the Milky way, Andromeda or even Triangulum, nor is it clustered with other dwarf galaxies in the local group.
The paper says
Since 2008, only three galaxies had been newly discovered in a spherical shell between radii 1 and 3Mpc around the Local Group. Two of them are dIrrs, UGC 4879 (Kopylov et al. 2008) and Leo P (Giovanelli et al. 2013), and the third one, KK 258 (Karachentsev et al. 2014), belongs to the transition type dTr with minimal but detectable gas and young stars. Here we report the discovery in this volume of a dwarf spheroidal system KKs 3 ([KK2000] 03 = SGC 0224.3–7345 in the nomencla- ture of the NASA/IPAC Extragalactic Database) at a distance of D = 2.12 ± 0.07 Mpc and well removed from any other known galaxy.
So the interesting feature isn't that it's close. It's that it's distant from any galaxy.