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KDG218, a nearby ultra-diffuse galaxy

Sharina, M. E.; Karachentsev, I. D.; Makarova, L. N. +1 more

We present properties of the low-surface-brightness galaxy KDG218 observed with the HST/ACS. The galaxy has a half-light (effective) diameter of a_e = 47″ and a central surface brightness of SB_V(0) = 24.^m4/□″. The galaxy remains unresolved with the HST/ACS, which implies its distance of D > 13.1 Mpc and linear ef…