> two of its three degrees of orbital freedom Three? > I know these things becau... | Hacker News

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		raattgift on Jan 3, 2019 \| parent \| context \| favorite \| on: New Horizons’ first hi-res imagery of Ultima Thule > two of its three degrees of orbital freedom Three? > I know these things because I used to work at JPL Ok, I don't. What are the three DoFs and how do they relate to 6DoFs or six Keplerian elements? Some background-fixing?

lisper on Jan 3, 2019 [–]

Brain wedgie. I meant six. And direct observations give you four of the six. I guess I was just thinking about 3-d location and just forgot about the time derivatives. Sorry.

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