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These properties suggest that 'Oumuamua is dense, composed of rock and possibly metals, has no water or ice, and that its surface was reddened due to the effects of irradiation from cosmic rays over hundreds of millions of years
[An artist’s impression of the ‘Oumuamua asteroid, which scientists are scanning for signs of intelligent life. Illustration: ESO/M Kornmesser/PA]
the truth is that current astronomical data really only gives a range of dimensions, and this object [Oumuamua] could have a more ordinary 4:1 axial ratio.