Lo and behold, the observations made in a rush as it left the solar system indicate this:
Karen Meech explains the significance: "This unusually large variation in brightness means that the object is highly elongated: about ten times as long as it is wide, with a complex, convoluted shape. We also found that it has a dark red colour, similar to objects in the outer Solar System, and confirmed that it is completely inert, without the faintest hint of dust around it."
These properties suggest that `Oumuamua is dense, possibly rocky or with high metal content, lacks significant amounts of water or ice, and that its surface is now dark and reddened due to the effects of irradiation from cosmic rays over millions of years. It is estimated to be at least 400 metres long.and the artists impression is this:
which seems to me, if you add more red, to be a fair approximation to this:
That's one of the versions of Red Dwarf, for those who don't know.
As usual, someone else on the 'net has probably already made the comparison - because it does seem kind of obvious to nerds.
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