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Advancing Current Understanding of Martian Impact‐Generated Hydrothermal Systems Through Novel Coupled Modeling: Insights From Gale, Jezero, and Other Craters Open
Impact‐generated hydrothermal systems are considered potentially habitable environments on Mars, Earth, and other planetary bodies for microbial life. However, there is an ongoing debate regarding what geological features on Mars provide d…
View article: The Psyche Light Elements Investigation
The Psyche Light Elements Investigation Open
Light elements, such as C, S, Si, O, C, and H, are thought to be present in Earth's liquid-Fe outer core. These elements lower melting temperatures, thereby allowing the core to remain in liquid state at high pressure and influencing magne…
View article: Prospects of a New <i>L</i> <sub>5</sub> Trojan Flyby Target for the Lucy Mission
Prospects of a New <i>L</i> <sub>5</sub> Trojan Flyby Target for the Lucy Mission Open
NASA’s Lucy spacecraft is en route to conduct the first close encounter with Jupiter’s Trojans. While most scheduled flybys lie in the L 4 cloud, the only L 5 target is the Patroclus–Menoetius binary. Since each flyby offers unique insight…
View article: Pit Chains on Asteroid (52246) Donaldjohanson
Pit Chains on Asteroid (52246) Donaldjohanson Open
On April 20, 2025, NASA’s Lucy spacecraft [1] completed its closest approach with main-belt asteroid (52246) Donaldjohanson [2]. Donaldjohanson appears to be a contact binary and is about 8 km long with a greater than 2 to 1 axis ratio [3]…
View article: Shape Reconstruction and Rotation State of Asteroid (52246) Donaldjohanson from Lucy Imaging and Ground-Based Photometry
Shape Reconstruction and Rotation State of Asteroid (52246) Donaldjohanson from Lucy Imaging and Ground-Based Photometry Open
On April 20, 2025, while crossing the Main Asteroid Belt, the NASA Lucy mission—en route to the Jupiter Trojan regions—encountered its second cruise target, the C-type asteroid (52246) Donaldjohanson.During the fly-by, the L’LORRI instrume…
View article: The Crater and Boulder Populations of Asteroid (52246) Donaldjohanson
The Crater and Boulder Populations of Asteroid (52246) Donaldjohanson Open
NASA’s Lucy mission [1] to the Trojan asteroids executed an engineering test flyby of asteroid (52246) Donaldjohanson on 20 April 2025. Data were gathered by all Lucy instruments, including the Lucy Long-Range Reconnaissance Imager (L’LORR…
View article: Geologic Mapping of Asteroid (52246) Donaldjohanson as observed by NASA’s Lucy mission
Geologic Mapping of Asteroid (52246) Donaldjohanson as observed by NASA’s Lucy mission Open
NASA’s Lucy mission will study the Jupiter Trojan asteroids, which are thought to be a physically and compositionally diverse group of primitive planetesimals that originated in the outer Solar System from ~15-30 AU [1]. The Jupiter Trojan…
View article: Interior and gravity characterization of the C-type asteroid (52246) Donaldjohanson seen by NASA’s Lucy flyby
Interior and gravity characterization of the C-type asteroid (52246) Donaldjohanson seen by NASA’s Lucy flyby Open
NASA’s Lucy [1] successfully flew by the C-type asteroid (52246) Donaldjohanson [2] on April 20, 2025 [3]. The asteroid exhibited unique topographic and geological features [4-6]. While the imaged area was limited to the illuminated hemisp…
View article: The Lucy Encounter with asteroid (52246) Donaldjohanson - An Overview
The Lucy Encounter with asteroid (52246) Donaldjohanson - An Overview Open
On April 20, 2025 NASA's Lucy mission performed a flyby of the main belt asteroid (52246) Donaldjohanson, hereafter DJ. Lucy is a NASA Discovery-class mission to study primitive bodies near both the L4 and L5 Lagrange points with Jupiter -…
View article: An overview of the geology on the C-type Main Belt asteroid (52246) Donaldjohanson from NASA’s Lucy flyby
An overview of the geology on the C-type Main Belt asteroid (52246) Donaldjohanson from NASA’s Lucy flyby Open
NASA’s Lucy mission [1] will explore the Trojan asteroids, a population of small bodies in the Sun-Jupiter L4 and L5 Lagrange points. En route to the Trojans, Lucy encountered the main belt C-type asteroid (52246) Donaldjohanson on April 2…
View article: (52246) Donaldjohanson and the Architecture of Bilobed Small Bodies
(52246) Donaldjohanson and the Architecture of Bilobed Small Bodies Open
The Lucy spacecraft flew by the Main Belt asteroid (52246) Donaldjohanson, hereafter DJ, on April 20, 2025. Images obtained during the flyby show DJ to be an elongated object, about 8 km long with an axis ratio greater than 2 to 1, consist…
View article: Phyllosilicates on Donaldjohanson as seen from the Lucy Flyby
Phyllosilicates on Donaldjohanson as seen from the Lucy Flyby Open
NASA’s Lucy mission [1] successfully completed a flyby encounter with the main-belt asteroid (52246) Donaldjohanson on April 20, 2025, collecting data as part of a full-scale operational test for Lucy’s future Trojan encounters. Donaldjoha…
Opportunities for a Dinkinesh-Sized Trojan Flyby in the L5 Cloud Open
Spacecraft flybys offer unparalleled opportunities to investigate small Solar System bodies. These encounters enable disk-resolved imaging and spectroscopy, revealing surface composition, morphology, collisional history, and the potential …
View article: Compositional analysis of (52246) Donaldjohanson from the Lucy flyby
Compositional analysis of (52246) Donaldjohanson from the Lucy flyby Open
The NASA Lucy mission was designed to provide the first reconnaissance of Jupiter Trojan asteroids. These primitive bodies hold important clues to the origin and evolution of the Solar System. The Lucy spacecraft is currently en route to i…
View article: Lightcurve of Asteroid (52246)Donaldjohanson from the Lucy Spacecraft’s Observations
Lightcurve of Asteroid (52246)Donaldjohanson from the Lucy Spacecraft’s Observations Open
The Lucy Mission is a NASA Discovery class mission to study the Trojan asteroids. Its targets are the asteroids Eurybates (Aug. 2027), Polymele (Sep. 2027), Leucus (Apr. 2028), Orus (Nov. 2028) and the Patroclus – Menoetius binary (Mar. 20…
View article: Albedo Features on (52246) Donaldjohanson, from Lucy L’LORRI Observations
Albedo Features on (52246) Donaldjohanson, from Lucy L’LORRI Observations Open
During its April 20th 2025 flyby of the approximately 8 km long C-type asteroid (52246) Donaldjohanson, the Lucy spacecraft obtained several hundred spatially resolved images of the target with the panchromatic Lucy Long Range Reconnaissan…
View article: Size-Frequency Distribution of S-complex Implanted Asteroids.
Size-Frequency Distribution of S-complex Implanted Asteroids. Open
Introduction: The main asteroid belt (MAB) is known for having a very small total mass (5x10-4 Earth masses) and for being primarily composed of S- and C-complex bodies [1]. Isotopic measurements on meteorites suggest C-complex bodies, man…
View article: Uncertainty estimations for the mass determination of the Lucy mission target asteroids using Doppler tracking data
Uncertainty estimations for the mass determination of the Lucy mission target asteroids using Doppler tracking data Open
The Lucy spacecraft was launched in 2021. After two gravity assists at Earth and the flybys at binary main-belt asteroid (152830) Dinkinesh in November 2023 and just recently at (52246) Donaldjohanson in the asteroid belt the spacecraft is…
View article: An Overview of Lucy L'Ralph Observations at (52246) Donaldjohanson and (152830) Dinkinesh: Visible and Near-Infrared Data of Two Main Belt Asteroids
An Overview of Lucy L'Ralph Observations at (52246) Donaldjohanson and (152830) Dinkinesh: Visible and Near-Infrared Data of Two Main Belt Asteroids Open
Lucy is the first mission to Jupiter Trojan asteroids, primitive bodies preserving crucial evidence of Solar System formation and evolution [1]. En route to its primary science encounters with the L4 swarm Trojans (2027-2028) and L5 swarm …
View article: Resolved Color of Main-Belt Asteroid (52246) Donaldjohanson as seen by NASA’s Lucy Mission
Resolved Color of Main-Belt Asteroid (52246) Donaldjohanson as seen by NASA’s Lucy Mission Open
Introduction: On the 20th of April 2025, NASA’s Lucy mission [1] flew by the C-type main-belt asteroid (52246) Donaldjohanson (hereafter DJ). The encounter’s goal was to test the spacecraft and instruments during an observation sequence co…
View article: NASA’S Lucy Mission to Trojan Asteroids: Unraveling the History of the Outer Solar System
NASA’S Lucy Mission to Trojan Asteroids: Unraveling the History of the Outer Solar System Open
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…
View article: Thermal-IR Observations of (152830) Dinkinesh during the Lucy Mission Flyby
Thermal-IR Observations of (152830) Dinkinesh during the Lucy Mission Flyby Open
NASA’s Lucy spacecraft flew by the main-belt asteroid (152830) Dinkinesh on 2023 November 1, providing a test of its instruments and systems prior to its encounters with the Jupiter Trojans and enabling an opportunity for scientific invest…
View article: Lucy Mission Search Plans for Activity around Its Jovian Trojan Flyby Targets
Lucy Mission Search Plans for Activity around Its Jovian Trojan Flyby Targets Open
Activity in small bodies, defined here as the episodic or continuous release of material, was long thought to be exclusively a behavior of comets, but it has since been discovered in some centaurs, main-belt asteroids, and near-Earth aster…
View article: Size–Frequency Distribution of Terrestrial Leftover Planetesimals and S-complex Implanted Asteroids
Size–Frequency Distribution of Terrestrial Leftover Planetesimals and S-complex Implanted Asteroids Open
The isotopic composition of meteorites linked to S-complex asteroids has been used to suggest that these asteroids originated in the terrestrial planet’s region, i.e., within 1.5 au, and later got implanted into the main asteroid belt (MAB…
View article: Size-Frequency Distribution of Terrestrial Leftover Planetesimals and S-complex Implanted Asteroids
Size-Frequency Distribution of Terrestrial Leftover Planetesimals and S-complex Implanted Asteroids Open
The isotopic composition of meteorites linked to S-complex asteroids has been used to suggest that these asteroids originated in the terrestrial planet's region, i.e., within 1.5 au, and later got implanted into the main asteroid belt (MAB…
View article: Mass Determination of the Lucy Mission target asteroids using radio tracking data
Mass Determination of the Lucy Mission target asteroids using radio tracking data Open
The LUCY spacecraft was launched in 2021. After two gravity assists at Earth and the flybys at binary main-belt asteroid (152830) Dinkinesh in November 2023 and just recently at (52246) Donaldjohanson in the asteroid belt the spacecraft is…
View article: A Pre-flyby View on the Origin of Asteroid Donaldjohanson, a Target of the NASA Lucy Mission
A Pre-flyby View on the Origin of Asteroid Donaldjohanson, a Target of the NASA Lucy Mission Open
The NASA Lucy mission is scheduled to fly by the main-belt asteroid (52246) Donaldjohanson on 2025 April 20. Donaldjohanson (DJ hereafter) is a member of the primitive (C-type class) Erigone collisional asteroid family located in the inner…
View article: Dimorphos’s Material Properties and Estimates of Crater Size from the DART Impact
Dimorphos’s Material Properties and Estimates of Crater Size from the DART Impact Open
On 2022 September 26, the Double Asteroid Redirection Test (DART) spacecraft intentionally collided with Dimorphos, the moon of the binary asteroid system 65803 Didymos. This collision provided the first full-scale test of a kinetic impact…
View article: Lucy L′Ralph In-flight Calibration and Results at (152830) Dinkinesh
Lucy L′Ralph In-flight Calibration and Results at (152830) Dinkinesh Open
The L’Ralph instrument is a key component of NASA’s Lucy mission, intended to provide spectral image data of multiple Jupiter Trojans. The instrument operates from ∼0.35 to 4 μ m using two focal plane assemblies: a 350–950 nm multispectral…