• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to secondary sidebar
  • NEWS:
  • SatNews
  • SatMagazine
  • MilSatMagazine
  • SmallSat News
  • |     EVENTS:
  • SmallSat Symposium
  • Satellite Innovation
  • MilSat Symposium

SatNews

  • HOME
  • Magazines
  • Events
  • SmallSat Europe Insights
  • Industry Calendar
    • IN PERSON
    • VIRTUAL
  • Subscribe

Jupiter’s Trojan Asteroids Are The Target For NASA’s Lucy Mission, Now Being Prepared

September 28, 2021

NASA has tested the functions of Lucy, the agency’s first spacecraft to study Jupiter’s Trojan asteroids, filled it with fuel and is preparing to pack it into a capsule for launch on Saturday, October 16.

Named after characters in Greek mythology, these asteroids circle the Sun in two swarms, with one group leading ahead of Jupiter in its path, the other trailing behind it. Lucy will be the first spacecraft to visit these asteroids. By studying these asteroids up close, scientists hope to hone their theories on how our solar system’s planets formed 4.5 billion years ago and why they ended up in their current configuration.

“With Lucy, we’re going to eight never-before-seen asteroids in 12 years with a single spacecraft,” said Tom Statler, Lucy project scientist at NASA Headquarters in Washington. “This is a fantastic opportunity for discovery as we probe into our solar system’s distant past.”

The United Launch Alliance (ULA) Centaur stage for NASA’s Lucy mission is lifted by crane into the Vertical Integration Facility near Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida on Thursday, September 16, 2021. Over its 12-year primary mission, Lucy will explore a record-breaking number of asteroids, flying by one asteroid in the solar system’s main belt and seven Trojan asteroids. Additionally, Lucy’s path will circle back to Earth three times for gravity assists, making it the first spacecraft ever to return to the vicinity of Earth from the outer solar system.

Following all pandemic protocols, Lucy team members have spent the past eight weeks at NASA’s Kennedy Space Center in Florida, preparing the spacecraft for flight. Engineers have tested the spacecraft’s mechanical, electrical, and thermal systems and practiced executing the launch sequence from the mission operations centers at Kennedy and Lockheed Martin Space in Littleton, Colorado. In early August, engineers installed the spacecraft’s high-gain antenna, its second most prominent feature after the expansive solar arrays, which will allow the spacecraft to communicate with Earth.

“There has been a lot of hands-on work,” said Donya Douglas-Bradshaw, Lucy project manager at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “This summer has gone by so fast; it’s hard to believe we’re nearly at launch.”

On September 18, propulsion engineers finished filling Lucy’s fuel tanks with approximately 1,600 pounds (725 kilograms) of liquid hydrazine and liquid oxygen, which make up 40% of the mass of the spacecraft. The fuel will be used for precise maneuvers that will propel Lucy to its asteroid destinations on schedule, while the solar arrays – each the width of a school bus – will recharge the batteries that will power spacecraft instruments.

The Lucy spacecraft will soon be packed into the two halves of the launch vehicle fairing, which will close around it like a clamshell. After the spacecraft is encapsulated, the Lucy team will be able to communicate with it electrically through an “umbilical cord.”

“Launching a spacecraft is almost like sending a child off to college – you’ve done what can for them to get them ready for that next big step on their own,” said Hal Levison, the principal investigator of the Lucy mission, based at the Southwest Research Institute in Boulder, Colorado.

This diagram illustrates Lucy’s orbital path. The spacecraft’s path (green) is shown in a frame of reference where Jupiter remains stationary, giving the trajectory its pretzel-like shape. After launch in October 2021, Lucy has two close Earth flybys before encountering its Trojan targets. In the L4 cloud Lucy will fly by (3548) Eurybates (white) and its satellite, (15094) Polymele (pink), (11351) Leucus (red), and (21900) Orus (red) from 2027-2028. After diving past Earth again Lucy will visit the L5 cloud and encounter the (617) Patroclus-Menoetius binary (pink) in 2033. As a bonus, in 2025 on the way to the L4, Lucy flies by a small Main Belt asteroid, (52246) Donaldjohanson (white), named for the discoverer of the Lucy fossil. After flying by the Patroclus-Menoetius binary in 2033, Lucy will continue cycling between the two Trojan clouds every six years.
Credits: Southwest Research Institute

In early October, the encapsulated spacecraft will be transported to the Vehicle Integration Facility at the Cape Canaveral Space Force Station, where it will be “mated” with the United Launch Alliance Atlas V 401 rocket. The Atlas V will lift off from Space Launch Complex 41. The rocket will carry Lucy outside Earth’s atmosphere to begin the long journey to the Trojan asteroids.

A few days prior to launch, engineers will power up the Lucy spacecraft in preparation for the mission. This process will take about 20 minutes.

“The spacecraft will sit in launch configuration and the engineering team will continuously monitor its health and status to make sure Lucy is ready to go,” said Jessica Lounsbury, the Lucy project systems engineer at Goddard. “And then it’s launch day.”

Lucy’s first launch attempt is scheduled for 5:34 a.m. EDT on October 16. That day, the team will be “called to stations” at 1:00 a.m., which is when everyone is expected to arrive at mission control and other stations to monitor the spacecraft and run through the full launch countdown procedures. If weather or any other issues prohibit a launch that day, the team will have additional launch opportunities beginning the following day.

Southwest Research Institute in Boulder, Colorado, is the home institution of the principal investigator for the Lucy mission. Goddard 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 agency’s Science Mission Directorate in Washington. The launch is managed by NASA’s Launch Services Program based at Kennedy.

Filed Under: Agencies, Launch, Mission, NASA / JPL, Space

Primary Sidebar

Most Read Stories

  • Space Debris, and the EU’s Space Act
  • In celebration of Juneteenth
  • Wishing Everyone a Happy July 4th … Independence Day, U.S.A.
  • Eutelsat's efforts to obtain funding to save OneWeb
  • Forrester's Digest: Starlink active in Iran

About Satnews

  • Contacts
  • History

Archives

  • July 2025
  • June 2025
  • May 2025
  • April 2025
  • March 2025
  • February 2025
  • January 2025
  • December 2024
  • November 2024
  • October 2024
  • September 2024
  • August 2024
  • July 2024
  • June 2024
  • May 2024
  • April 2024
  • March 2024
  • February 2024
  • January 2024
  • December 2023
  • November 2023
  • October 2023
  • September 2023
  • August 2023
  • July 2023
  • June 2023
  • May 2023
  • April 2023
  • March 2023
  • February 2023
  • January 2023
  • December 2022
  • November 2022
  • October 2022
  • September 2022
  • August 2022
  • July 2022
  • June 2022
  • May 2022
  • April 2022
  • March 2022
  • February 2022
  • January 2022
  • December 2021
  • November 2021
  • October 2021
  • September 2021
  • August 2021
  • July 2021
  • June 2021
  • May 2021
  • April 2021
  • March 2021
  • February 2021
  • January 2021
  • December 2020
  • November 2020
  • October 2020
  • September 2020
  • August 2020
  • July 2020
  • June 2020
  • May 2020
  • April 2020

Secondary Sidebar

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkPrivacy policy
x
Sign up Now (For Free)
Access daily or weekly satellite news updates covering all aspects of the commercial and military satellite industry.
Invalid email address
Notify Me Regarding ( At least one ):
We value your privacy and will not sell or share your email or other information with any other company. You may also unsubscribe at anytime.

Click Here to see our full privacy policy.
Thanks for subscribing!