120 Lachesis is a very large and very dark main-belt asteroid. As a primitive C-type asteroid it is probably composed of carbonaceous material. It was discovered by Alphonse Borrelly on April 10, 1872, and named after Lachesis, one of the Moirai, or Fates, in Greek mythology. The only observed Lachesean occultation occurred in 1999 and was recorded in the south-western United States.
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- 119 Althaea
- 120 Lachesis
- 121 Hermione
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