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The Massalia asteroid family as the origin of ordinary L chondrites

The Massalia asteroid family is identified as the remnant of the collisional event that gave rise to ordinary L chondrites, the most abundant class of meteorites in our collections.

M. Marsset
P. Vernazza
D. Polishook
Research16 Oct 2024
Nature

Volume: 634, P: 561-565
Numerical simulations suggest asteroids (101955) Bennu and (162173) Ryugu are likely second or later generation rubble piles

Asteroids Ryugu and Bennu have been linked to collisional families in the main belt, but their surface ages suggest younger parents than their putative families. Here, the authors show numerical simulations that suggest these asteroids are likely remnants of later disruptions of original family members.

K. J. Walsh
R-L. Ballouz
D. S. Lauretta
ResearchOpen Access05 Jul 2024
Nature Communications

Volume: 15, P: 1-10
Bennu’s near-Earth lifetime of 1.75 million years inferred from craters on its boulders

Analysis of the size and depth of craters on boulders on the asteroid (101955) Bennu indicates that Bennu has been in near-Earth space for 1.75 ± 0.75 million years.

R.-L. Ballouz
K. J. Walsh
D. S. Lauretta
Research26 Oct 2020
Nature

Volume: 587, P: 205-209
Alignment of fractures on Bennu’s boulders indicative of rapid asteroid surface evolution

Fractures on the asteroid Bennu imaged by the OSIRIS-REx spacecraft are consistent with cracking induced by diurnal temperature variations over geologically rapid timescales.

Marco Delbo
Kevin J. Walsh
Dante S. Lauretta
Research23 May 2022
Nature Geoscience

Volume: 15, P: 453-457
Fine-regolith production on asteroids controlled by rock porosity

The absence of fine regolith on the asteroid Bennu is due to the high porosity of its rocks, which compress rather than fragment after impacts and exhibit slow thermal cracking.

S. Cambioni
M. Delbo
D. S. Lauretta
Research06 Oct 2021
Nature

Volume: 598, P: 49-52
Exogenic basalt on asteroid (101955) Bennu

Six bright boulders of exotic material on near-Earth asteroid (101955) Bennu stand out from the average asteroidal surface. This unexpected record of impactors offers clues to the formation history of Bennu.

D. N. DellaGiustina
H. H. Kaplan
D. S. Lauretta
Research21 Sept 2020
Nature Astronomy

Volume: 5, P: 31-38

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The Massalia asteroid family as the origin of ordinary L chondrites

Numerical simulations suggest asteroids (101955) Bennu and (162173) Ryugu are likely second or later generation rubble piles

Bennu’s near-Earth lifetime of 1.75 million years inferred from craters on its boulders

Alignment of fractures on Bennu’s boulders indicative of rapid asteroid surface evolution

Fine-regolith production on asteroids controlled by rock porosity

Exogenic basalt on asteroid (101955) Bennu

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