Environment of Hedgehog. We show the distribution of neighboring galaxies from Karachentsev et al. (2013) in the supergalactic coordinate system centered at Hedgehog. The left panels show the 2D projected distributions, and the right panel provides a close-up view of the environment in 3D. The size of the circle represents the virial radius of the host halo. Galaxies that are more (less) massive than M _⋆ = 10^9.7 M _⊙ are shown in purple (blue). Hedgehog is 1.7 Mpc (∼4–5 R _vir) from its nearest galaxy group, Cen A. Hedgehog’s closest neighbors, highlighted in orange, are at least 1 Mpc away. Hedgehog is thus one of the most isolated quiescent dwarf galaxies. An interactive version of this figure is available at the author’s website, https://astrojacobli.github.io/research/Hedgehog/.

An interactive version of this figure is also available in the online article.

An interactive version of this figure is available.

An interactive version of this figure is available in the online journal.