Members Can Post Anonymously On This Site
-
Similar Topics
-
By NASA
NASA’s Lucy spacecraft is 6 days and less than 50 million miles (80 million km) away from its second close encounter with an asteroid; this time, the small main belt asteroid Donaldjohanson.
Download high-resolution video and images from NASA’s Scientific Visualization Studio.
NASA/Dan Gallagher This upcoming event represents a comprehensive “dress rehearsal” for Lucy’s main mission over the next decade: the exploration of multiple Trojan asteroids that share Jupiter’s orbit around the Sun. Lucy’s first asteroid encounter – a flyby of the tiny main belt asteroid Dinkinesh and its satellite, Selam, on Nov. 1, 2023 – provided the team with an opportunity for a systems test that they will be building on during the upcoming flyby.
Lucy’s closest approach to Donaldjohanson will occur at 1:51pm EDT on April 20, at a distance of 596 miles (960 km). About 30 minutes before closest approach, Lucy will orient itself to track the asteroid, during which its high-gain antenna will turn away from Earth, suspending communication. Guided by its terminal tracking system, Lucy will autonomously rotate to keep Donaldjohanson in view. As it does this, Lucy will carry out a more complicated observing sequence than was used at Dinkinesh. All three science instruments – the high-resolution greyscale imager called L’LORRI, the color imager and infrared spectrometer called L’Ralph, and the far infrared spectrometer called L’TES – will carry out observation sequences very similar to the ones that will occur at the Trojan asteroids.
However, unlike with Dinkinesh, Lucy will stop tracking Donaldjohanson 40 seconds before the closest approach to protect its sensitive instruments from intense sunlight.
“If you were sitting on the asteroid watching the Lucy spacecraft approaching, you would have to shield your eyes staring at the Sun while waiting for Lucy to emerge from the glare. After Lucy passes the asteroid, the positions will be reversed, so we have to shield the instruments in the same way,” said encounter phase lead Michael Vincent of Southwest Research Institute (SwRI) in Boulder, Colorado. “These instruments are designed to photograph objects illuminated by sunlight 25 times dimmer than at Earth, so looking toward the Sun could damage our cameras.”
Fortunately, this is the only one of Lucy’s seven asteroid encounters with this challenging geometry. During the Trojan encounters, as with Dinkinesh, the spacecraft will be able to collect data throughout the entire encounter.
After closest approach, the spacecraft will “pitch back,” reorienting its solar arrays back toward the Sun. Approximately an hour later, the spacecraft will re-establish communication with Earth.
“One of the weird things to wrap your brain around with these deep space missions is how slow the speed of light is,” continued Vincent. “Lucy is 12.5 light minutes away from Earth, meaning it takes that long for any signal we send to reach the spacecraft. Then it takes another 12.5 minutes before we get Lucy’s response telling us we were heard. So, when we command the data playback after closest approach, it takes 25 minutes from when we ask to see the pictures before we get any of them to the ground.”
Once the spacecraft’s health is confirmed, engineers will command Lucy to transmit the science data from the encounter back to Earth, which is a process that will take several days.
Donaldjohanson is a fragment from a collision 150 million years ago, making it one of the youngest main belt asteroids ever visited by a spacecraft.
“Every asteroid has a different story to tell, and these stories weave together to paint the history of our solar system,” said Tom Statler, Lucy mission program scientist at NASA Headquarters in Washington. “The fact that each new asteroid we visit knocks our socks off means we’re only beginning to understand the depth and richness of that history. Telescopic observations are hinting that Donaldjohanson is going to have an interesting story, and I’m fully expecting to be surprised – again.”
NASA’s Goddard Space Flight Center in Greenbelt, Maryland, designed and built the L’Ralph instrument and provides overall mission management, systems engineering and safety and mission assurance for Lucy. Hal Levison of SwRI’s office in Boulder, Colorado, is the principal investigator. SwRI, headquartered in San Antonio, also leads the science team and the mission’s science observation planning and data processing. Lockheed Martin Space in Littleton, Colorado, built the spacecraft, designed the original orbital trajectory and provides flight operations. Goddard and KinetX Aerospace are responsible for navigating the Lucy spacecraft. The Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, designed and built the L’LORRI (Lucy Long Range Reconnaissance Imager) instrument. Arizona State University in Tempe, Arizona, designed and build the L’TES (Lucy Thermal Emission Spectrometer) instrument. Lucy is the thirteenth mission in NASA’s Discovery Program, which is managed by NASA’s Marshall Space Flight Center in Huntsville, Alabama.
By Katherine Kretke, Southwest Research Institute
Media Contact:
Karen Fox / Molly Wasser
Headquarters, Washington
202-358-1600
karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
Nancy N. Jones
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Share
Details
Last Updated Apr 14, 2025 EditorMadison OlsonContactNancy N. Jonesnancy.n.jones@nasa.govLocationGoddard Space Flight Center Related Terms
Lucy Goddard Space Flight Center Planetary Science Explore More
4 min read New Modeling Assesses Age of Next Target Asteroid for NASA’s Lucy
Article 4 weeks ago 3 min read NASA’s Lucy Spacecraft Takes Its 1st Images of Asteroid Donaldjohanson
Article 2 months ago 3 min read NASA’s Lucy Asteroid Target Gets a Name
Article 2 years ago View the full article
-
By NASA
On April 8, 2025, Bangladesh became the 54th nation to sign the accords. The commitments of the Artemis Accords and efforts by the signatories to advance implementation of these principles support the safe and sustainable exploration of space.NASA Following a signing ceremony Tuesday in Bangladesh’s capital city of Dhaka, NASA congratulates Bangladesh as the 54th nation to commit to the safe and responsible exploration of space that benefits humanity.
“We are thrilled by Bangladesh’s signature of the Accords,” said NASA acting Administrator Janet Petro. “Bangladesh affirms its role in shaping the future of space exploration. This is about ensuring that our journey to the Moon – and beyond – is peaceful, sustainable, and transparent. We look forward to working together, to learning from one another, and to seeing how Bangladesh’s incredible talent and vision contribute to humanity’s next great chapter in space.”
Ashraf Uddin, the secretary of defense for Bangladesh,signed the Artemis Accords on behalf of the country. Charge d’Affaires Tracey Jacobson for the U.S. Embassy in Dhaka, Bangladesh, participated in the event, and Petro contributed remarks in a pre-recorded video message.
“Bangladesh’s commitment to the Artemis Accords will enhance the country’s engagement with NASA and the international community,” said Bangladesh’s Chief Advisor Muhammad Yunus. “By signing the accords, Bangladesh builds upon an important foundation for the open, responsible and peaceful exploration of space.”
In 2020, the United States, led by NASA and the U.S. Department of State, and seven other initial signatory nations established the Artemis Accords, a first-ever set of practical guidelines for nations to increase safety of operations and reduce risk and uncertainty in their civil exploration activities. That group of signatories has grown to more than 50 countries today.
The Artemis Accords are grounded in the Outer Space Treaty and other agreements, including the Registration Convention and the Rescue and Return Agreement, as well as best practices for responsible behavior that NASA and its partners have supported, including the public release of scientific data.
Learn more about the Artemis Accords at:
https://www.nasa.gov/artemis-accords
-end-
Amber Jacobson / Jennifer Dooren
Headquarters, Washington
202-358-1600
amber.c.jacobson@nasa.gov / jennifer.m.dooren@nasa.gov
Share
Details
Last Updated Apr 08, 2025 EditorJennifer M. DoorenLocationNASA Headquarters Related Terms
Office of International and Interagency Relations (OIIR) Artemis Accords View the full article
-
By NASA
Robert Markowitz The four astronauts who will be the first to fly to the Moon under NASA’s Artemis campaign have designed an emblem to represent their mission that references both their distant destination and the home they will return to. The crew unveiled their patch in this April 2, 2025, photo.
The crew explained the patch’s symbolism, and its play on the abbreviation of Artemis II to AII, with the following description: The Artemis II test flight begins when a mighty team launches the first crew of the Artemis generation. This patch designates the mission as “AII,” signifying not only the second major flight of the Artemis campaign, but also an endeavor of discovery that seeks to explore for all and by all. Framed in Apollo 8’s famous Earthrise photo, the scene of the Earth and the Moon represents the dual nature of human spaceflight, both equally compelling: The Moon represents our exploration destination, focused on discovery of the unknown. The Earth represents home, focused on the perspective we gain when we look back at our shared planet and learn what it is to be uniquely human. The orbit around Earth highlights the ongoing exploration missions that have enabled Artemis to set sights on a long-term presence on the Moon and soon, Mars.
Commander Reid Wiseman, pilot Victor Glover, and mission specialist Christina Koch from NASA, and mission specialist Jeremy Hansen from CSA (Canadian Space Agency), will venture around the Moon in 2026 on Artemis II. The 10-day flight will test NASA’s foundational human deep space exploration capabilities, the SLS rocket, Orion spacecraft, for the first time with astronauts. Through Artemis, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and build the foundation for the first crewed missions to Mars.
Text credit: Brandi Dean, Courtney Beasley
Image credit: NASA/Robert Markowitz
View the full article
-
-
By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Astronauts Victor Glover and Christina Koch tour the Arc Jet Facility at NASA’s Ames Research Center, learning more about the testing equipment’s capabilities to analyze thermal protection systems from George Raiche, thermophysics facilities branch chief at Ames.NASA/Donald Richey As NASA prepares to send astronauts to the Moon aboard the Orion spacecraft, research, testing, and development at NASA’s Ames Research Center in California’s Silicon Valley has played a critical role.
Recently, Ames welcomed Artemis II astronauts Christina Koch and Victor Glover and Orion leaders Debbie Korth, deputy program manager, and Luis Saucedo, deputy crew and service module manager, to tour Ames facilities that support the Orion Program and celebrate the achievements of employees.
The group started their visit at the Arc Jet Complex, where researchers use extremely hot, high-speed gases to simulate the intense heat of atmospheric reentry before visiting the Sensors & Thermal Protection Systems Advanced Research Laboratories. The team works to develop sensors and flight instrumentation that measure heat shield response throughout a mission.
These systems were used to develop and test Orion’s thermal protection system to ensure the safety of astronauts during future missions. After the successful return of the Artemis I Orion spacecraft, Ames research was essential when analyzing unexpected charring loss on the heat shield.
Debbie Korth, Orion deputy program manager, presents awards to the Ames workforce at the Orion Circle of Excellence Awards Ceremony, while astronauts Christina Koch and Victor Glover look on.NASA/Donald Richey The visit culminated in an award ceremony to honor employees with outstanding performance and a legacy of service to the Orion Program. Thirty-two employees were honored for their individual or team contributions.
“The Ames workforce has played an important role in developing, testing, and validating the Orion spacecraft’s thermal protection system as well as supporting its software and guidance, navigation, and control,” said Eugene Tu, NASA Ames center director. “I’m pleased to see their contributions recognized and celebrated by program leadership and two of the astronauts whose safety and success were in mind when ensuring these systems are safe, reliable, and the highest quality possible.”
Share
Details
Last Updated Apr 02, 2025 Related Terms
Ames Research Center Artemis Christina H. Koch Exploration Systems Development Mission Directorate General Orion Program Victor J. Glover Explore More
2 min read What Are the Dangers of Going to Space? We Asked a NASA Expert: Episode 55
Article 1 hour ago 2 min read NASA Receives 10 Nominations for the 29th Annual Webby Awards
Article 1 day ago 4 min read NASA Trains for Orion Water Recovery Ahead of Artemis II Launch
Article 2 days ago Keep Exploring Discover More Topics From NASA
Ames Research Center
Orion Spacecraft
Arc Jet Complex
Thermal Protection Materials Branch
View the full article
-
-
Check out these Videos
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.