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Banner image: Artist's depiction of the twin Janus spacecraft. (Credit: Lockheed Martin)

CU Boulder and Lockheed Martin will lead a new space mission to capture the first-ever closeup look at a mysterious class of solar system objects: binary asteroids.

These bodies are pairs of asteroids that orbit around each other in space, much like the Earth and moon. In a project review on Sept. 3, NASA gave the official go-ahead to the Janus mission, named after the two-faced Roman god. The mission will study these asteroid couplets in never-before-seen detail.听

It will be a moment for twos: In 2022, the Janus team will launch two identical spacecraft that will travel millions of miles to individually fly close to two pair of binary asteroids. Their observations could open up a new window into how these diverse bodies evolve and even burst apart over time, said Daniel Scheeres, the principal investigator for Janus. 听听

鈥淏inary asteroids are one class of objects for which we don鈥檛 have high-resolution scientific data,鈥� said Scheeres, distinguished professor in the Ann and H.J. Smead Department of Aerospace Engineering Sciences at CU Boulder. 鈥淓verything we have on them is based on ground observations, which don鈥檛 give you as much detail as being up close.鈥�

The mission, which will cost less than $55 million under NASA鈥檚 , may also help to usher in a new era of space exploration, said Lockheed Martin鈥檚 Josh Wood. He explained that Janus鈥� twin spacecraft are designed to be small and nimble, each one about the size of a carry-on suitcase.听

鈥淲e see an advantage to be able to shrink our spacecraft,鈥� said Wood, project manager for the mission. 鈥淲ith technology advancements, we can now explore our solar system and address important science questions with smaller spacecraft.鈥�

Janus is led by the University of baby直播app Boulder, where Scheeres is based, which will also undertake the scientific analysis of images and data for the mission. Lockheed Martin will manage, build and operate the spacecraft.

Fly-bys

For Lockheed Martin and Scheeres, the Janus mission is the latest step in a long history of getting up close to asteroids. They鈥檝e both played major roles, for example, in NASA鈥檚 OSIRIS-REx mission, which is currently in orbit around the asteroid Bennu. Lockheed Martin built and supports operations of the spacecraft, while Scheeres leads the mission鈥檚 radio science team.听

鈥淭his partnership embodies two of the university鈥檚 greatest assets in aerospace,鈥� said Vice Chancellor for Research and Innovation Terri Fiez. 鈥淐ombining the top-notch research听and student researchers in aerospace at CU Boulder with the capabilities of industry partners like Lockheed Martin enables us to accelerate transformational discoveries out into the market for real-world impact.鈥�

But binary asteroids, which represent about 15% of the solar system鈥檚 asteroids, add a new level of complexity to the story of rocky debris in space.

鈥淲e think that binary asteroids form when you have a single asteroid that gets spun up so fast that the whole thing splits in two and goes through this crazy dance,鈥� Scheeres said.

The mission will rendezvous with two binary pairs鈥攏amed 1996 FG3 and 1991 VH鈥攅ach showcasing a different kind of crazy dance. The pair called 1991 VH, for example, is the wildcard of the two with a 鈥渕oon鈥� that whips around a much bigger primary asteroid following a hard-to-predict pattern.听

The team will use a suite of cameras to track these dynamics in unprecedented detail. Among other goals, Scheeres and his colleagues hope to learn more about how binary asteroids move鈥攂oth around each other and through space.

鈥淥nce we see them up close, there will be a lot of questions we can answer, but these will raise new questions as well,鈥� he said. 鈥淲e think Janus will motivate additional missions to binary asteroids.鈥�

Small and fast

The entire mission, Wood added, is being designed to be as flexible and hardy as possible.听

Wood explained that over the last decade, spacecraft have become smaller as scientists have turned to pint-sized spacecraft called CubeSats and SmallSats to collect data. Such missions cut down on costs and preparation time by using more affordable off-the-shelf parts.

Janus鈥� twin spacecraft, however, will venture farther than any of these miniature missions to date. After blasting off in 2022, they鈥檒l first complete an orbit around the sun, before heading back toward Earth and sling-shotting their way far into space and beyond the orbit of Mars. It鈥檚 a long way to go for machines that weigh only about 80 pounds each.

鈥淚 think it鈥檚 a great test for what is achievable from the aerospace community,鈥� Wood said. 鈥淎nd the baby直播app-centric development for this mission, combining the space talent of both CU Boulder and Lockheed Martin, is a testament to the skills available in the state.鈥�

And, Wood added, the team is ready to get started in earnest on the mission: There鈥檚 a lot to do before the spacecraft launch in just two years.听

鈥淲e see this evolution to smaller and more capable spacecraft being a key market in the future for scientific missions,鈥� Wood said. 鈥淣ow, we want to execute and show that we can do it.鈥�