Orbital period change of Dimorphos due to the DART kinetic impact
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Orbital period change of Dimorphos due to the DART kinetic impact. / Thomas, Cristina A.; Naidu, Shantanu P.; Scheirich, Peter; Moskovitz, Nicholas A.; Pravec, Petr; Chesley, Steven R.; Rivkin, Andrew S.; Osip, David J.; Lister, Tim A.; Benner, Lance A.M.; Brozović, Marina; Contreras, Carlos; Morrell, Nidia; Rożek, Agata; Kušnirák, Peter; Hornoch, Kamil; Mages, Declan; Taylor, Patrick A.; Seymour, Andrew D.; Snodgrass, Colin; Jørgensen, Uffe G.; Dominik, Martin; Skiff, Brian; Polakis, Tom; Knight, Matthew M.; Farnham, Tony L.; Giorgini, Jon D.; Rush, Brian; Bellerose, Julie; Salas, Pedro; Armentrout, William P.; Watts, Galen; Busch, Michael W.; Chatelain, Joseph; Gomez, Edward; Greenstreet, Sarah; Phillips, Liz; Bonavita, Mariangela; Burgdorf, Martin J.; Khalouei, Elahe; Longa-Peña, Penélope; Rabus, Markus; Sajadian, Sedighe; Chabot, Nancy L.; Cheng, Andrew F.; Ryan, William H.; Ryan, Eileen V.; Holt, Carrie E.; Agrusa, Harrison F.
I: Nature, Bind 616, Nr. 7957, 2023, s. 448-451.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Orbital period change of Dimorphos due to the DART kinetic impact
AU - Thomas, Cristina A.
AU - Naidu, Shantanu P.
AU - Scheirich, Peter
AU - Moskovitz, Nicholas A.
AU - Pravec, Petr
AU - Chesley, Steven R.
AU - Rivkin, Andrew S.
AU - Osip, David J.
AU - Lister, Tim A.
AU - Benner, Lance A.M.
AU - Brozović, Marina
AU - Contreras, Carlos
AU - Morrell, Nidia
AU - Rożek, Agata
AU - Kušnirák, Peter
AU - Hornoch, Kamil
AU - Mages, Declan
AU - Taylor, Patrick A.
AU - Seymour, Andrew D.
AU - Snodgrass, Colin
AU - Jørgensen, Uffe G.
AU - Dominik, Martin
AU - Skiff, Brian
AU - Polakis, Tom
AU - Knight, Matthew M.
AU - Farnham, Tony L.
AU - Giorgini, Jon D.
AU - Rush, Brian
AU - Bellerose, Julie
AU - Salas, Pedro
AU - Armentrout, William P.
AU - Watts, Galen
AU - Busch, Michael W.
AU - Chatelain, Joseph
AU - Gomez, Edward
AU - Greenstreet, Sarah
AU - Phillips, Liz
AU - Bonavita, Mariangela
AU - Burgdorf, Martin J.
AU - Khalouei, Elahe
AU - Longa-Peña, Penélope
AU - Rabus, Markus
AU - Sajadian, Sedighe
AU - Chabot, Nancy L.
AU - Cheng, Andrew F.
AU - Ryan, William H.
AU - Ryan, Eileen V.
AU - Holt, Carrie E.
AU - Agrusa, Harrison F.
N1 - Publisher Copyright: © 2023, The Author(s).
PY - 2023
Y1 - 2023
N2 - The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, the secondary of near-Earth binary asteroid (65803) Didymos, and changing the orbital period of Dimorphos. A change in orbital period of approximately 7 min was expected if the incident momentum from the DART spacecraft was directly transferred to the asteroid target in a perfectly inelastic collision1, but studies of the probable impact conditions and asteroid properties indicated that a considerable momentum enhancement (β) was possible2,3. In the years before impact, we used lightcurve observations to accurately determine the pre-impact orbit parameters of Dimorphos with respect to Didymos4–6. Here we report the change in the orbital period of Dimorphos as a result of the DART kinetic impact to be −33.0 ± 1.0 (3σ) min. Using new Earth-based lightcurve and radar observations, two independent approaches determined identical values for the change in the orbital period. This large orbit period change suggests that ejecta contributed a substantial amount of momentum to the asteroid beyond what the DART spacecraft carried.
AB - The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, the secondary of near-Earth binary asteroid (65803) Didymos, and changing the orbital period of Dimorphos. A change in orbital period of approximately 7 min was expected if the incident momentum from the DART spacecraft was directly transferred to the asteroid target in a perfectly inelastic collision1, but studies of the probable impact conditions and asteroid properties indicated that a considerable momentum enhancement (β) was possible2,3. In the years before impact, we used lightcurve observations to accurately determine the pre-impact orbit parameters of Dimorphos with respect to Didymos4–6. Here we report the change in the orbital period of Dimorphos as a result of the DART kinetic impact to be −33.0 ± 1.0 (3σ) min. Using new Earth-based lightcurve and radar observations, two independent approaches determined identical values for the change in the orbital period. This large orbit period change suggests that ejecta contributed a substantial amount of momentum to the asteroid beyond what the DART spacecraft carried.
U2 - 10.1038/s41586-023-05805-2
DO - 10.1038/s41586-023-05805-2
M3 - Journal article
C2 - 36858072
AN - SCOPUS:85152472438
VL - 616
SP - 448
EP - 451
JO - Nature Genetics
JF - Nature Genetics
SN - 1061-4036
IS - 7957
ER -
ID: 370731039