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Title: EXTREME AO OBSERVATIONS OF TWO TRIPLE ASTEROID SYSTEMS WITH SPHERE

We present the discovery of a new satellite of asteroid (130) Elektra—S/2014 (130) 1—in differential imaging and in integral field spectroscopy data over multiple epochs obtained with Spectro-Polarimetric High-contrast Exoplanet Research/Very Large Telescope. This new (second) moonlet of Elektra is about 2 km across, on an eccentric orbit, and about 500 km away from the primary. For a comparative study, we also observed another triple asteroid system, (93) Minerva. For both systems, component-resolved reflectance spectra of the satellites and primary were obtained simultaneously. No significant spectral difference was observed between the satellites and the primary for either triple system. We find that the moonlets in both systems are more likely to have been created by sub-disruptive impacts as opposed to having been captured.
Authors:
; ; ;  [1] ;  [2] ; ;  [3] ;  [4]
  1. European Southern Observatory, Santiago (Chile)
  2. National Observatory, Rio de Janeiro (Brazil)
  3. Carl Sagan Center at the SETI Institute, Mountain View, CA (United States)
  4. Institut de Mécanique Céleste et de Calcul des Éphémérides, Paris (France)
Publication Date:
OSTI Identifier:
22518539
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 820; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTEROIDS; ORBITS; PLANETS; SATELLITES; SPECTROSCOPY; SPHERES; TELESCOPES