After seeing this new image from the NASA - Dawn Spacecraft, Astronomers and Planetary Scientists are puzzled over a (for now, still kind of) mysterious and large Circular Suface Feature located South of the Equator of the Dwarf Planet 1-Ceres, and slightly to the right (Dx) of center in this view. This Basin, nearly 186 miles (such as a little less than 300 Km) across, is not as deep as it would be expected for an Impact Crater, (and this is what makes it, in a way, "mysterious") and appears to contain low-relief Mounds.
This image was taken by the NASA - Dawn Spacecraft on February, 19, 2015 from a distance of nearly 29.000 miles (such as approx. 46.670,86 Km) from 1-Ceres.
This image (which is an Original NASA - Dawn Spacecraft's b/w and NON Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 18925)