There's a bit of a complication when one realizes that objects are always distinguished from other objects, and defined or conceived as different from other objects, by a subject. Supposedly, without subjects trying to analyse the world and categorize the stuff around them, there would be still an objective reality "out there", but not necessarily segmented, or contrasted the way we see it. For all we know, the universe may be just one big whole, every thing connected to everything else. So there's a valid argument that we (subjects) do the segmenting of the universe into distinct objects by looking at it analytically. In this sense, objects are not totally mind-independent: their are always objects of one's attention in a way. But they are mind-independent enough, in the sense that once you delineated them as distinct from the rest, objects behave mind-independently. "The mountain" will be here tomorrow and the day after, reliably so, even though an objective limit is hard to definefind between "the mountain" and "the valleyvalley".