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Characterizing asteroid (152830) Dinkinesh in preparation for the encounter with the NASA Lucy mission: a photometric study

Mottola, Stefano and Denk, Tilmann and Marchi, Simone and Binzel, Richard and Noll, Keith S. and Spencer, John R. and Levison, Harold F. (2023) Characterizing asteroid (152830) Dinkinesh in preparation for the encounter with the NASA Lucy mission: a photometric study. Monthly Notices of the Royal Astronomical Society: Letters, 524 (1), L1-L4. Oxford University Press. doi: 10.1093/mnrasl/slad066. ISSN 1745-3925.

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Official URL: https://academic.oup.com/mnrasl/article/524/1/L1/7191263


Main Belt asteroid (152830) Dinkinesh will be the first fly-by target of the Lucy mission on 2023 November 1, during its cruise to the Trojan clouds. We report our photometric time series observations of this target performed on 14 nights over nearly three months during the 2022-23 apparition with the 1.23-m telescope at Calar Alto, Spain, aimed at determining its rotation and photometric properties. We find that Dinkinesh is a slow rotator ( P syn = 52.67 ±0.04 h) with a moderately large light-curve amplitude ( A = 0.39 ±0.02), which implies an axial ratio a / b > 1.43. Its photometric parameters in the HG-system are H R = 17.17 ±0.04 and G R = 0.378 ±0.035 with a colour index V –R = 0.455 ±0.025. A fit to the IAU H , G 1 , G 2 system results in H R (H , G 1 , G 2 ) = 17.17 ±0.14; G 1 = 0.37 ±0.17 and G 2 = 0.43 ±0.04. Assuming that Dinkinesh’s albedo lies within ±2σ of the average value for small S-class asteroids, its spherical surface-equivalent diameter is between 0.66 and 1.36 km.

Item URL in elib:https://elib.dlr.de/195704/
Document Type:Article
Title:Characterizing asteroid (152830) Dinkinesh in preparation for the encounter with the NASA Lucy mission: a photometric study
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mottola, StefanoUNSPECIFIEDhttps://orcid.org/0000-0002-0457-3872UNSPECIFIED
Denk, TilmannUNSPECIFIEDhttps://orcid.org/0000-0003-0764-3677UNSPECIFIED
Marchi, SimoneSouthwest Research Institute, Boulder, CO, USAhttps://orcid.org/0000-0003-2548-3291UNSPECIFIED
Binzel, RichardDepartment of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USAUNSPECIFIEDUNSPECIFIED
Noll, Keith S.NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USAUNSPECIFIEDUNSPECIFIED
Spencer, John R.Southwest Research Institute, Boulder, USAUNSPECIFIEDUNSPECIFIED
Levison, Harold F.Southwest Research Institute, Boulder, CO, USAhttps://orcid.org/0000-0001-5847-8099UNSPECIFIED
Date:6 June 2023
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society: Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:L1-L4
Publisher:Oxford University Press
Keywords:photometry, minor planets, asteroids, (152830) Dinkinesh
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - LUCY
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Geology
Deposited By: Mottola, Dr.phys. Stefano
Deposited On:28 Jun 2023 07:40
Last Modified:28 Jun 2023 07:40

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