A contact binary satellite of the asteroid (152830) Dinkinesh

被引：11

作者：

Levison, Harold F. ^{[1
]}

Marchi, Simone ^{[1
]}

Noll, Keith S. ^{[2
]}

Spencer, John R. ^{[1
]}

Statler, Thomas S. ^{[3
]}

Bell, James F. ^{[4
]}

Bierhaus, Edward B. ^{[5
]}

Binzel, Richard ^{[6
]}

Bottke, William F. ^{[1
]}

Britt, Daniel ^{[7
]}

Brown, Michael E. ^{[8
]}

Buie, Marc W. ^{[1
]}

Christensen, Philip R. ^{[4
]}

Dello Russo, Neil ^{[9
]}

Emery, Joshua P. ^{[10
]}

Grundy, William M. ^{[10
,11
]}

Hahn, Matthias ^{[12
]}

Hamilton, Victoria E. ^{[1
]}

Howett, Carly ^{[13
]}

Kaplan, Hannah ^{[2
]}

Kretke, Katherine ^{[1
]}

Lauer, Tod R. ^{[14
]}

Manzoni, Claudia ^{[15
]}

Marschall, Raphael ^{[16
]}

Martin, Audrey C. ^{[7
]}

May, Brian H. ^{[15
]}

Mottola, Stefano ^{[17
]}

Olkin, Catherine B. ^{[18
]}

Paetzold, Martin ^{[12
]}

Parker, Joel Wm. ^{[1
]}

Porter, Simon ^{[1
]}

Preusker, Frank ^{[17
]}

Protopapa, Silvia ^{[1
]}

Reuter, Dennis C. ^{[2
]}

Robbins, Stuart J. ^{[1
]}

Salmon, Julien ^{[1
]}

Simon, Amy A. ^{[2
]}

Stern, S. Alan ^{[1
]}

Sunshine, Jessica M. ^{[19
]}

Wong, Ian ^{[2
,20
]}

Weaver, Harold A. ^{[9
]}

Adam, Coralie ^{[21
]}

Ancheta, Shanti ^{[5
]}

Andrews, John ^{[1
]}

Anwar, Saadat ^{[4
]}

Barnouin, Olivier S. ^{[9
]}

Beasley, Matthew ^{[1
]}

Berry, Kevin E. ^{[2
]}

Birath, Emma ^{[1
]}

Bolin, Bryce ^{[2
]}

机构：

[1] Southwest Res Inst, Boulder, CO 80302 USA

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[3] NASA Headquarters, Washington, DC USA

[4] Arizona State Univ, Tempe, AZ USA

[5] Lockheed Martin Space, Littleton, CO USA

[6] MIT, Cambridge, MA USA

[7] Univ Cent Florida, Orlando, FL USA

[8] CALTECH, Pasadena, CA USA

[9] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[10] No Arizona Univ, Flagstaff, AZ USA

[11] Lowell Observ, Flagstaff, AZ USA

[12] Univ Cologne, Rhein Inst Umweltforsch, Cologne, Germany

[13] Univ Oxford, Oxford, England

[14] NSFs Natl Opt Infrared Astron Res Lab, Tucson, AZ USA

[15] London Stereoscop Co, London, England

[16] CNRS, Observ Cote Azur, Lab JL Lagrange, Nice, France

[17] DLR Inst Planetary Res, Berlin, Germany

[18] Muon Space, Mountain View, CA USA

[19] Univ Maryland, College Pk, MD USA

[20] Amer Univ, Washington, DC USA

[21] KinetX Space Nav & Flight Dynam Practice, Simi Valley, CA USA

[22] Indigo Informat Serv, Tucson, AZ USA

[23] Red Canyon Software, Denver, CO USA

[24] Cornell Univ, Ithaca, NY USA

[25] Marshall Space Flight Ctr, Huntsville, AL USA

[26] Lauffer Space Engn, Littleton, CO USA

[27] Teton Cyber Technol, Littleton, CO USA

[28] Rochester Inst Technol, Rochester, NY USA

[29] Stellar Solut, Denver, CO USA

[30] Big Head Endian, Burden, KS USA

来源：

NATURE | 2024年 / 629卷 / 8014期

关键词：

POPULATION; DYNAMICS;

D O I：

10.1038/s41586-024-07378-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Asteroids with diameters less than about 5 km have complex histories because they are small enough for radiative torques (that is, YORP, short for the Yarkovsky-O'Keefe-Radzievskii-Paddack effect) 1 to be a notable factor in their evolution 2 . (152830) Dinkinesh is a small asteroid orbiting the Sun near the inner edge of the main asteroid belt with a heliocentric semimajor axis of 2.19 au; its S-type spectrum 3,4 is typical of bodies in this part of the main belt 5 . Here we report observations by the Lucy spacecraft 6,7 as it passed within 431 km of Dinkinesh. Lucy revealed Dinkinesh, which has an effective diameter of only 720 m, to be unexpectedly complex. Of particular note is the presence of a prominent longitudinal trough overlain by a substantial equatorial ridge and the discovery of the first confirmed contact binary satellite, now named (152830) Dinkinesh I Selam. Selam consists of two near-equal-sized lobes with diameters of 210 m and 230 m. It orbits Dinkinesh at a distance of 3.1 km with an orbital period of about 52.7 h and is tidally locked. The dynamical state, angular momentum and geomorphologic observations of the system lead us to infer that the ridge and trough of Dinkinesh are probably the result of mass failure resulting from spin-up by YORP followed by the partial reaccretion of the shed material. Selam probably accreted from material shed by this event. Observations from the Lucy spacecraft of the small main-belt asteroid (152830) Dinkinesh reveals unexpected complexity, with a longitudinal trough and equatorial ridge, as well as the discovery of the first contact binary satellite.

引用

页码：1015 / 1020

页数：9

共 43 条

[21] Binary asteroids in the near-Earth object population
Margot, JL
Nolan, MC
Benner, LAM
Ostro, SJ
Jurgens, RF
Giorgini, JD
Slade, MA
Campbell, DB
[J]. SCIENCE, 2002, 296 (5572) : 1445 - 1448
[22] Collisional formation of top-shaped asteroids and implications for the origins of Ryugu and Bennu
Michel, P.
Ballouz, R-L
Barnouin, O. S.
Jutzi, M.
Walsh, K. J.
May, B. H.
Manzoni, C.
Richardson, D. C.
Schwartz, S. R.
Sugita, S.
Watanabe, S.
Miyamoto, H.
Hirabayashi, M.
Bottke, W. F.
Connolly, H. C.
Yoshikawa, M.
Lauretta, D. S.
[J]. NATURE COMMUNICATIONS, 2020, 11 (01)
[23] Lightcurve analysis of near-Earth objects from the IMPACTON project: Evidence of binary systems and cohesion strength
Monteiro, Filipe
Lazzaro, Daniela
Rondon, Eduardo
Arcoverde, Plicida
Evangelista-Santana, Marcal
Michimani, Jonatan
Pereira, Weslley
Mesquita, Wesley
Medeiros, Hissa
Correa, Tatiane
Silva-Cabrera, Jose
Rodrigues, Teresinha
[J]. ICARUS, 2023, 390
[24] Characterizing asteroid (152830) Dinkinesh in preparation for the encounter with the NASA Lucy mission: a photometric study
Mottola, Stefano
Denk, Tilmann
Marchi, Simone
Binzel, Richard P.
Noll, Keith S.
Spencer, John R.
Levison, Harold F.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2023, 524 (01) : L1 - L4
[25] Generalization of the super ellipsoid concept and its application in mechanics
Ni, B. Y.
Elishakoff, I.
Jiang, C.
Fu, C. M.
Han, X.
[J]. APPLIED MATHEMATICAL MODELLING, 2016, 40 (21-22) : 9427 - 9444
[26] Lucy Mission to the Trojan Asteroids: Instrumentation and Encounter Concept of Operations
Olkin, Catherine B.
Levison, Harold F.
Vincent, Michael
Noll, Keith S.
Andrews, John
Gray, Sheila
Good, Phil
Marchi, Simone
Christensen, Phil
Reuter, Dennis
Weaver, Harold
Patzold, Martin
Bell, James F.
Hamilton, Victoria E.
Russo, Neil Dello
Simon, Amy
Beasley, Matt
Grundy, Will
Howett, Carly
Spencer, John
Ravine, Michael
Caplinger, Michael
[J]. PLANETARY SCIENCE JOURNAL, 2021, 2 (05):
[27] Radar Imaging of binary near-Earth asteroid (66391) 1999 KW4
Ostro, Steven. J.
Margot, Jean-Luc
Benner, Lance A. M.
Giorgini, Jon D.
Scheeres, Daniel J.
Fahnestock, Eugene G.
Broschart, Stephen B.
Bellerose, Julie
Nolan, Michael C.
Magri, Christopher
Pravec, Petr
Scheirich, Petr
Rose, Randy
Jurgens, Raymond F.
De Jong, Eric M.
Suzuki, Shigeru
[J]. SCIENCE, 2006, 314 (5803) : 1276 - 1280
[28] Palmer E., 2023, 55 ANN M DIV PLAN SC
[29] Tidal dissipation of binaries in asteroid pairs
Pou, Laurent
Nimmo, Francis
[J]. ICARUS, 2024, 411
[30] Binary asteroid population - 1. Angular momentum content
Pravec, P.
Harris, A. W.
[J]. ICARUS, 2007, 190 (01) : 250 - 259

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