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Showing 1–8 of 8 results
Advanced filters: Author: P. Pravec Clear advanced filters

  • The 33 minute change in the orbital period of Dimorphos after the DART kinetic impact suggests that ejecta contributed a substantial amount of momentum to the asteroid compared with the DART spacecraft alone.

    • Cristina A. Thomas
    • Shantanu P. Naidu
    • Harrison F. Agrusa
    ResearchOpen Access
    Nature
    Volume: 616, P: 448-451

  • Numerical simulations of the DART impact on asteroid Didymos’s moon Dimorphos highlight its rubble-pile nature with a low bulk density and boulder volume fraction. These results indicate that Dimorphos formed from reaccumulated material shed from Didymos via rotation or impact.

    • S. D. Raducan
    • M. Jutzi
    • B. H. May
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 445-455

  • Rotational fission may explain the formation of pairs of asteroids that have similar heliocentric orbits but are not bound together. These authors report photometric observations of a sample of asteroid pairs revealing that the primaries of pairs with mass ratios much less than 0.2 rotate rapidly, near their critical fission frequency. In agreement with crucial predictions, they do not find asteroid pairs with mass ratios larger than 0.2, and as the mass ratio approaches 0.2 the primary period grows long.

    • P. Pravec
    • D. Vokrouhlický
    • A. Leroy
    Research
    Nature
    Volume: 466, P: 1085-1088

  • On 6 October 2008, a small asteroid designated 2008 TC3 hit the Earth in northern Sudan. Jenniskens et al. searched along the approach trajectory and luckily found 47 bits of a meteorite named Almahata Sitta. Analysis reveals it to be a porous achondrite and a polymict ureilite, and so the asteroid was F-class (dark carbon-rich anomalous ureilites).

    • P. Jenniskens
    • M. H. Shaddad
    • S. P. Worden
    Research
    Nature
    Volume: 458, P: 485-488

  • The impact of the DART spacecraft on the asteroid Dimorphos is reported and reconstructed, demonstrating that kinetic impactor technology is a viable technique to potentially defend Earth from asteroids.

    • R. Terik Daly
    • Carolyn M. Ernst
    • Yun Zhang
    ResearchOpen Access
    Nature
    Volume: 616, P: 443-447