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Breaking Records, Returning Asteroid Samples Among NASA’s Big 2023
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA’s Lucy spacecraft has its next flyby target, the small main belt asteroid Donaldjohanson, in its sights. By blinking between images captured by Lucy on Feb. 20 and 22, this animation shows the perceived motion of Donaldjohanson relative to the background stars as the spacecraft rapidly approaches the asteroid.
NASA’s Lucy spacecraft’s first views of the asteroid Donaldjohanson. The asteroid is circled on the left to guide the eye.NASA/Goddard/SwRI/Johns Hopkins APL Lucy will pass within 596 miles (960 km) of the 2-mile-wide asteroid on April 20. This second asteroid encounter for the Lucy spacecraft will serve as a dress-rehearsal for the spacecraft’s main targets, the never-before-explored Jupiter Trojan asteroids. Lucy already successfully observed the tiny main belt asteroid Dinkinesh and its contact-binary moon, Selam, in November 2023. Lucy will continue to image Donaldjohanson over the next two months as part of its optical navigation program, which uses the asteroid’s apparent position against the star background to ensure an accurate flyby.
Donaldjohanson will remain an unresolved point of light during the spacecraft’s long approach and won’t start to show surface detail until the day of the encounter.
From a distance of 45 million miles (70 million km), Donaldjohanson is still dim, though it stands out clearly in this field of relatively faint stars in the constellation of Sextans. Celestial north is to the right of the frame, and the 0.11-degree field of view would correspond to 85,500 miles (140,000 km) at the distance of the asteroid. In the first of the two images, another dim asteroid can be seen photobombing in the lower right quadrant of the image. However, just as the headlights of an approaching car often appear relatively stationary, Donaldjohanson’s apparent motion between these two images is much smaller than that of this interloper, which has moved out of the field of view in the second image.
These observations were made by Lucy’s high-resolution camera, the L’LORRI instrument — short for Lucy LOng Range Reconnaissance Imager — provided by the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland.
Asteroid Donaldjohanson is named for anthropologist Donald Johanson, who discovered the fossilized skeleton — called “Lucy” — of a human ancestor. NASA’s Lucy mission is named for the fossil.
Lucy’s principal investigator, Hal Levison, is based out of the Boulder, Colorado, branch of Southwest Research Institute, headquartered in San Antonio. NASA’s Goddard Space Flight Center in Greenbelt, Maryland, provides overall mission management, systems engineering, and safety and mission assurance. Lockheed Martin Space in Littleton, Colorado, built the spacecraft. Lucy is the 13th mission in NASA’s Discovery Program. NASA’s Marshall Space Flight Center in Huntsville, Alabama, manages the Discovery Program for the Science Mission Directorate at NASA Headquarters in Washington.
For more information about NASA’s Lucy mission, visit: https://www.nasa.gov/lucy
By Katherine Kretke
Southwest Research Institute
Media Contact:
Nancy N. Jones
NASA’s Goddard Space Flight Center, Greenbelt, Md.
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Last Updated Feb 25, 2025 Related Terms
Lucy General Goddard Space Flight Center Planetary Science The Solar System Trojan Asteroids View the full article
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By European Space Agency
The latest analysis from the European Space Agency (ESA) Planetary Defence Office has reduced the probability that asteroid 2024 YR4 might impact Earth in 2032 to 0.001%.
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By NASA
Jonathan Gardner of NASA’s Goddard Space Flight Center in Greenbelt, Maryland, was selected as a 2023 Fellow of the American Astronomical Society (AAS) for extraordinary achievement and service. He is being recognized for exceptional community service and scientific leadership of NASA’s James Webb Space Telescope science teams, leading to Webb’s flight hardware exceeding all of its requirements.
Dr. Jonathan Gardner is the Deputy Senior Project Scientist for the James Webb Space Telescope at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.Credits: Courtesy of Jonathan Gardner Gardner is the deputy senior project scientist for the Webb telescope in Goddard’s Astrophysics Science Division. Webb, which launched Dec. 25, 2021, is the largest, most powerful, and most complex space science telescope ever built. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency.
John Mather, senior project scientist on Webb and a senior astrophysicist at Goddard, nominated Gardner for the fellowship. In his nomination, Mather wrote:
“Jonathan Gardner is a quiet superstar, well known to the Webb community. As deputy senior project scientist for Webb, Gardner represents the senior project scientist in all aspects of the mission, with responsibility for ensuring Webb’s scientific performance. Gardner is a tireless advocate for the scientific vision and its accurate implementation. He is the main spokesperson for Webb science throughout NASA and in the wider astronomy community. He is the person most responsible for keeping the science teams working well together and for communicating with other astronomers.”
Gardner began working on Webb as a member of the Ad-Hoc Science Working Group in the late 1990s, joining the project as the deputy senior project scientist in 2002.
Beginning in 2002, Gardner organized all the meetings and communications of the Science Working Group, which included people from the U.S., Europe, and Canada, including instrument teams and other partners. He recruited Goddard scientists for the mission’s Project Science Team, and ensured a scientist was assigned to every engineering topic. Gardner also wrote and published the scientific requirements in a dedicated issue of Space Science Reviews. He set up the Science Requirements Analysis Board to review any potential threats to the scientific goals of the mission and worked with engineering teams to avoid any failures. He represented scientific interests throughout the engineering project and throughout NASA, by ensuring regular communication between scientists, managers, and engineers.
The 2023 AAS Fellows are recognized for enhancing and sharing humanity’s scientific understanding of the universe through personal achievement and extraordinary service to the astronomical sciences and to the AAS.
AAS, established in 1899, is a major international organization of professional astronomers, astronomy educators, and amateur astronomers. Its membership of approximately 8,000 also includes physicists, geologists, engineers, and others whose interests lie within the broad spectrum of subjects now comprising the astronomical sciences. The mission of the AAS is to enhance and share humanity’s scientific understanding of the universe as a diverse and inclusive astronomical community, which it achieves through publishing, meetings, science advocacy, education and outreach, and training and professional development.
For information about NASA and agency programs, visit: https://www.nasa.gov
By Robert Gutro
NASA’s Goddard Space Flight Center, Greenbelt, Md.
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By European Space Agency
The European Space Agency (ESA) has endorsed the United Nations' (UN) designation of 2029 as the International Year of Asteroid Awareness and Planetary Defence.
The initiative will foster international collaboration in the field of planetary defence and educate the public on the risks and opportunities associated with near-Earth asteroids.
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