Mass of Vesta

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Science  19 Apr 1968:
Vol. 160, Issue 3825, pp. 299-300
DOI: 10.1126/science.160.3825.299


The asteroid 197 (Arete) approaches asteroid 4 (Vesta) within 0.04 astronomical unit once every 18 years. It may therefore be possible to determine the mass of Vesta from observations of Arete. From 72 observations a value of (1.20 ± 0.08) x 10-10 solar mass was derived, the indicated uncertainty being a probable error.

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