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NASA'S Lucy Mission to Trojan Asteroids: Unraveling the History of the Outer Solar System.

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Title: NASA'S Lucy Mission to Trojan Asteroids: Unraveling the History of the Outer Solar System.
Authors: Levison, Harold F.1 (AUTHOR) hal.levison@swri.org, Marchi, Simone1 (AUTHOR), Noll, Keith S.2 (AUTHOR), Spencer, John R.3 (AUTHOR), Olkin, Catherine B.4 (AUTHOR), Statler, Thomas S.5 (AUTHOR)
Source: Space Science Reviews. Aug2025, Vol. 221 Issue 5, p1-27. 27p.
Subjects: Solar system, Planetesimals, Lagrangian points, Origin of planets, Aerospace industries, United States. National Aeronautics & Space Administration, Space vehicles, Asteroid detection
Abstract: Lucy is a NASA Discovery-class mission to send a highly capable and robust spacecraft to investigate primitive bodies near both the L4 and L5 Lagrange points with Jupiter; the Jupiter Trojan asteroids. This heretofore unexplored population of planetesimals from the outer planetary system holds vital clues to deciphering the history of the Solar System. Due to an unusual and fortuitous orbital configuration, Lucy will perform a comprehensive investigation that visits eight Trojans, including all the recognized taxonomic classes, a collisional family member and a near equal-mass binary. It will visit objects with diameters ranging from roughly 1 to 100 km. In particular, Lucy will perform flybys of (3548) Eurybates and its satellite Queta (L4, C-type), (15094) Polymele and its currently unnamed satellite (L4, P-type), (11351) Leucus (L4, D-type), (21900) Orus (L4, D-type), and the (617) Patroclus-Menoetius binary (L5, P-types). This diverse array of targets will supply invaluable constraints on the formation and early dynamical evolution of the giant planets. In addition, Lucy will visit two main-belt asteroids, (152830) Dinkinesh and (52246) Donaldjohanson, in order to practice its encounters. Lucy's payload suite consists of a color camera and infrared imaging spectrometer, a high resolution panchromatic imager, and a thermal infrared spectrometer. Additionally, two spacecraft subsystems will also contribute to the science investigations: the terminal tracking cameras will supplement imaging during closest approach and the telecommunication subsystem will be used to measure the mass of the Trojans. Lucy launched on October 16, 2021 and will have encounters with the Trojans from August 2027 until March 2033. [ABSTRACT FROM AUTHOR]
Copyright of Space Science Reviews is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: NASA'S Lucy Mission to Trojan Asteroids: Unraveling the History of the Outer Solar System.
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  Data: Lucy is a NASA Discovery-class mission to send a highly capable and robust spacecraft to investigate primitive bodies near both the L4 and L5 Lagrange points with Jupiter; the Jupiter Trojan asteroids. This heretofore unexplored population of planetesimals from the outer planetary system holds vital clues to deciphering the history of the Solar System. Due to an unusual and fortuitous orbital configuration, Lucy will perform a comprehensive investigation that visits eight Trojans, including all the recognized taxonomic classes, a collisional family member and a near equal-mass binary. It will visit objects with diameters ranging from roughly 1 to 100 km. In particular, Lucy will perform flybys of (3548) Eurybates and its satellite Queta (L4, C-type), (15094) Polymele and its currently unnamed satellite (L4, P-type), (11351) Leucus (L4, D-type), (21900) Orus (L4, D-type), and the (617) Patroclus-Menoetius binary (L5, P-types). This diverse array of targets will supply invaluable constraints on the formation and early dynamical evolution of the giant planets. In addition, Lucy will visit two main-belt asteroids, (152830) Dinkinesh and (52246) Donaldjohanson, in order to practice its encounters. Lucy's payload suite consists of a color camera and infrared imaging spectrometer, a high resolution panchromatic imager, and a thermal infrared spectrometer. Additionally, two spacecraft subsystems will also contribute to the science investigations: the terminal tracking cameras will supplement imaging during closest approach and the telecommunication subsystem will be used to measure the mass of the Trojans. Lucy launched on October 16, 2021 and will have encounters with the Trojans from August 2027 until March 2033. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Space Science Reviews is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Lagrangian points
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              Text: Aug2025
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