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Mass and density of the B-type asteroid (702) Alauda

  • Author(s): Rojo, P;
  • Margot, JL
  • et al.
Abstract

Observations with the adaptive optics system on the Very Large Telescope reveal that the outer main belt asteroid (702) Alauda has a small satellite with primary to secondary diameter ratio of ∼56. The secondary revolves around the primary in 4.9143 ± 0.007 days at a distance of 1227 ± 24 km, yielding a total system mass of (6.057 ± 0.36) x 1018kg. Combined with an IRAS size measurement, our data yield a bulk density of 1570 ± 500 kg m-3for this B-type asteroid. © 2011. The American Astronomical Society.

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