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I agree. Where do they draw the line at dwarf planet and asteroid and/or comet? The thing is so far away. Are they able to confirm it's not just a chunk of i
by jgalt212 10y ago
I agree. Where do they draw the line at dwarf planet and asteroid and/or comet? The thing is so far away. Are they able to confirm it's not just a chunk of ice, and therefore comet in a nearly circular (for a comet) orbit?
- mcbits 10y agoI believe the threshold is whether it's large enough to have collapsed into a spheroid. Vesta is about the same size as they're estimating, and it's still too lumpy.