Details

Autor(en) / Beteiligte

• Simon, Amy A.
• Kaplan, Hannah H.
• Hamilton, Victoria E.
• Lauretta, Dante S.
• Campins, Humberto
• Barucci, M. Antonietta
• DellaGiustina, Daniella N.
• Reuter, Dennis C.
• Sandford, Scott A.
• Lim, Lucy F.
• Rozitis, Benjamin

Titel

Widespread carbon-bearing materials on near-Earth asteroid (101955) Bennu

Ist Teil von

• Science (American Association for the Advancement of Science), 2020-11, Vol.370 (6517)

Ort / Verlag

Goddard Space Flight Center: American Association for the Advancement of Science

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• (101955) Bennu is a dark, Earth orbit-crossing, asteroid thought to be assembled from the fragments of an ancient collision. Spatially-resolved visible and near-infrared spectra of Bennu provide details about its surface properties and composition. In addition to a hydrated phyllosilicate band, we detect a ubiquitous 3.4-micron absorption feature, which we attribute to a mix of organic and carbonate materials. The shape and depth of this absorption feature vary across Bennu’s surface, spanning the range seen among similar main-belt asteroids. Its distribution does not correlate with the temperature, reflectance, spectral slope, or hydrated minerals although those characteristics correlate with each other in some cases. The deepest 3.4-micron absorptions occur on individual boulders. The variations may be due to differences in abundance, recent exposure, or space weathering.