China’s Space Plane: Secret Mission

China has successfully completed a significant milestone in its aerospace development with the return of its experimental reusable spacecraft. After spending exactly 276 days in orbit, the mystery vehicle touched down at the Jiuquan Satellite Launch Center in northwest China. This event marks a pivotal moment in the global race for reusable space technology and raises questions about the capabilities of this secretive program.

The 276-Day Mystery Mission

The spacecraft landed on May 8, 2023, concluding a mission that began nearly nine months prior. This was not a short “hop” into space. The duration suggests that China has solved complex engineering challenges regarding power generation, thermal protection, and orbital maneuvering over long periods.

This specific mission launched on August 4, 2022, atop a Long March 2F rocket. While state media Xinhua released a brief statement confirming the success of the “experimental reusable spacecraft,” they provided no photographs and very few technical details. The secrecy mirrors the protocols surrounding the United States’ own robotic space plane, the X-37B.

A Massive Leap in Capability

To understand the significance of this 276-day flight, you must compare it to China’s previous attempt.

  • Mission 1 (2020): The first iteration of this spacecraft launched in September 2020 and stayed in orbit for only two days before returning.
  • Mission 2 (2022-2023): The vehicle remained in orbit for over nine months.

This jump from two days to 276 days indicates that Chinese engineers have rapidly matured the technology required for long-duration spaceflight. It implies high confidence in the vehicle’s solar power systems, batteries, and guidance hardware.

Tracking the "Shenlong"

While official details are scarce, international observers and amateur satellite trackers have pieced together a picture of what happened overhead. Often referred to as “Shenlong” (Divine Dragon), the vehicle is believed to be a space plane similar in shape and function to the Boeing X-37B.

During its 276 days in orbit, the spacecraft did not just sit idle. Ground-based tracking stations, including the 18th Space Defense Squadron of the U.S. Space Force, monitored the vehicle performing complex maneuvers.

The Companion Object

One of the most intriguing aspects of the mission occurred in late October 2022. Commercial space monitoring company LeoLabs reported that the Chinese space plane had ejected an object into orbit. This object was cataloged as “Object J.”

For several months, the space plane and Object J flew in close formation. Analysis of the orbital data showed that the space plane appeared to maneuver to maintain proximity to the object. This behavior suggests two potential capabilities:

  1. Inspection: The space plane may be equipped with sensors to inspect other satellites close up.
  2. Manipulation: It may possess a robotic arm or docking mechanism allowing it to capture, refuel, or repair other objects.

This “capture and release” technology is dual-use. While it is essential for clearing space junk or fixing broken satellites, it is also the fundamental technology required for anti-satellite weapons capable of disabling enemy spacecraft.

Comparison with the US X-37B

The parallels between the Chinese program and the American X-37B are undeniable. Both vehicles launch vertically on top of a rocket and land horizontally on a runway like an airplane.

Key Similarities:

  • Launch Method: Both use heavy-lift rockets (Long March 2F for China, Atlas V or Falcon 9 for the US).
  • Orbit: Both operate in Low Earth Orbit (LEO), typically between 300 and 500 kilometers above Earth.
  • Secrecy: Both nations classify the payloads and specific mission objectives of these flights.

Key Differences:

  • Duration: The US holds the endurance record. The X-37B’s sixth mission (OTV-6) lasted 908 days, ending in November 2022. China’s 276 days is impressive but still trails the US capability.
  • Experience: The US has been flying the X-37B since 2010. China’s program is newer, having started flight tests in 2020.

Strategic Implications of Reusability

The primary stated goal of the Chinese program is the “peaceful use of space” and reducing the cost of transport. Traditional rockets are discarded after one use. A reusable space plane changes the economics of spaceflight.

Why Reusability Matters

  1. Cost Reduction: Recovering the most expensive parts of the vehicle (engines, guidance computers, airframe) allows for cheaper access to orbit.
  2. Rapid Turnaround: If a vehicle can be refueled and relaunched quickly, it allows a nation to replace lost satellites or deploy new sensors immediately during a conflict.
  3. Earth-to-Earth Transport: Future iterations of this technology could theoretically transport cargo or personnel between two points on Earth in under an hour.

What Comes Next?

Following the successful landing in May 2023, China did not rest. A third mission launched on December 14, 2023. This rapid cadence—launching a new mission just seven months after the previous one landed—demonstrates that the program is moving from an experimental phase to an operational one.

The 276-day mission proved the platform works. The focus now shifts to what the platform carries. Whether used for materials science, surveillance, or testing orbital weaponry, China’s reusable space plane has become a permanent fixture in the orbital environment.

Frequently Asked Questions

What is the name of China’s space plane? The official name is simply the “Experimental Reusable Spacecraft” (CSSHQ). However, media and enthusiasts often refer to it as “Shenlong,” which translates to “Divine Dragon,” referencing an earlier Chinese aerospace project.

Where does the space plane land? The spacecraft lands at the Jiuquan Satellite Launch Center in the Gobi Desert. This facility has a long runway specifically designed to accommodate the return of space vehicles.

Is this a military vehicle? The program is run by China’s main state contractor, CASC (China Aerospace Science and Technology Corporation). Like the US X-37B, it is widely considered a dual-use asset. It has civilian applications (science experiments) and military applications (reconnaissance and satellite inspection).

How big is the Chinese space plane? Official specifications are classified. However, based on the payload capacity of the Long March 2F rocket used to launch it (which can carry about 8 metric tons to LEO), analysts estimate the space plane is likely similar in size to the US X-37B, which is roughly 29 feet (8.8 meters) long.