Claim: Holmberg 15A is a supergiant elliptical galaxy, which means it is approximately ellipsoidal  in shape and has a smooth and nearly featureless image, and was described on the  paper by Lopez-Cruz et al. as: "Therefore, we conservatively suggest that Holm 15A hosts an SMBH with a mass of ∼1×10 M☉."
Evidence: Holmberg 15A is a supergiant elliptical galaxy and the central dominant galaxy of the Abell 85 galaxy cluster in the constellation Cetus, about 700 million light-years from Earth. An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. The paper by Lopez-Cruz et al. stated: "Therefore, we conservatively suggest that Holm 15A hosts an SMBH with a mass of ∼1×10 M☉."