A photograph of the giant screen at the Beijing Aerospace Control Center shows photo of China's Chang'e 3 probe, taken by the country's first lunar rover, Yutu, during the mutual-photograph process, in Beijing December 15, 2013. China aims to launch its next unmanned lunar probe in 2017, with the key aim of collecting and bringing back lunar samples, an official said on Monday, after the country's first probe landed successfully on the moon over the weekend. Photographers were permitted to take photos of the video screen inside the control center. Picture taken December 15, 2013. REUTERS/Stringer (CHINA - Tags: SCIENCE TECHNOLOGY POLITICS) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA

China is set to launch a robotic moon mission this week, a "trial by fire" test of re-entry technology for the country's future lunar sample-return efforts.

To date there has been little official word on this unmanned mission, which may launch as early as Thursday (Oct. 23). It will apparently send a spacecraft around the moon; on its way back toward Earth, the probe will release a capsule to perform a high-speed plunge through the planet's atmosphere. The capsule will parachute onto terra firma to complete its voyage.

The soon-to-launch moon probe is based on China's Chang'e 2 lunar orbiter design and modified to carry the re-entry test capsule. The mission, which some China space watchers are calling "Chang'e 5 T1," is to last some nine days. [Most Awesome Moon Missions of All Time]

Narrow launch windows

Chang'e 5 T1 has three potential liftoff dates, experts say: Thursday, Friday or Saturday (Oct. 23, 24 or 25). The mission will launch atop a Chinese Long March 3C rocket from Xichang Satellite Launch Center.

The goal is to validate re-entry technology for Chang'e 5, a robotic mission targeted for a 2017 launch that will land on the moon, collect samples and return those specimens to Earth.

"We have begun to study how the Chang'e 5 will blast off from the moon and dock with the in-orbit re-entry capsule," said Wang Pengji, a space expert at the China Academy of Space Technology.

A central piece of China's moon plans is having hardware return to Earth at a scorching speed of more than 25,000 mph (40,230 km/h).

Hitchhiking payload

Onboard the last stage of China's moon-bound booster is a hitchhiking payload provided by the European space technology company OHB AG. This private "4M mission" is dedicated to OHB founder Manfred Fuchs, who died earlier this year. (4M stands for the "Manfred Memorial Moon Mission.")

The 31-pound (14 kilograms) 4M microspacecraft — developed at LuxSpace of Luxembourg, an affiliate of OHB AG — is designed to fly by the moon and then return Earthward.

LuxSpace has been working with radio amateurs around the world to listen for transmissions from the 4M spacecraft and send in collected data.

4M also totes a tiny dosimeter, provided by Spanish company iC-Málaga of Mallorca, that gauges radiation levels throughout the satellite's circumlunar trajectory.

Nominal countdown

"So far, the countdown is nominal," said Ghislain Ruy, research and development manager for LuxSpace.

"We have a long record of cooperation with the China Great Wall Industry Corporation. They are very professional at all levels," Ruy told Space.com, referring to the company that provides commercial launch services for the Chinese government. "However, there is a huge organization … and nothing goes quickly despite some notable exceptions. This mission, for example."

China's space technicians "are amazingly dynamic and determined to [meet] their goals," Ruy said. "Competence, support, hospitality and politeness are premium."

Ruy said the 4M mission is a big one for LuxSpace.

"For us, this opens a new door, even if this is a tiny step and a limited-time mission," Ruy said. "This mission led us to think in other ways, learn and solve new problems and open new paths … all in all improving our competence and preparing our future."

Step by step

China is pursuing a step-by-step robotic moon exploration program, one that would appear to also sharpen the country's technological know-how to land humans on the moon.

Yu Dengyun, deputy chief designer of China's lunar probe mission, told the state-run Xinhua news agency earlier this month that the Chang'e 4 moon mission will also verify technology for Chang'e-5.

Yu said that Chang'e 4 is the backup probe of Chang'e 3, which successfully landed on the moon in December 2013 and deployed the Yutu lunar rover.

Chang'e 4 will help hone the skills needed to attempt the more sophisticated Chang'e 5 and 6 missions, Yu said. Those spacecraft are designed to perform tasks that include robotic lunar sampling and returning those samples to Earth.

New launch center

Meanwhile, several Chinese news agencies have reported that construction of the new Wenchang Satellite Launch Center on the northeast coast of the island of Hainan is nearing operational status.

The complex is to be China's fourth and most advanced space launch center. Reports tag it as completely built, making the center the country's first coastal satellite launch facility.