NEW YORK — China’s Shenzhou-8 spacecraft, the first Chinese vehicle to conduct a space docking, returned to Earth Nov. 17 after a successful mission.

The spacecraft was an unmanned version of the ship that carries Chinese astronauts (known as taikonauts) to space. It landed in Inner Mongolia after 18 days in space.

Shenzhou-8 began its mission Oct. 31, launching atop a Chinese Long March 2F rocket from the Jiuquan Satellite Launch Center in Inner Mongolia. While in orbit, Shenzhou-8 rendezvoused with China’s robotic Tiangong-1 spacecraft, which had launched Sept. 29.

After orbital tests, the two spacecraft linked up Nov. 2 in China’s first docking maneuver. The autonomous docking apparently went smoothly, and was hailed as a major space technology success in China.

After Shenzhou-8’s landing, Chinese Vice Premier Zhang Dejiang delivered a congratulatory note from the country’s top authorities celebrating the docking mission, according to state news agency Xinhua. The commander of China’s manned space program, Chang Wanquan, called Shenzhou-8’s mission “a complete success.”

After the first docking, Shenzhou-8 and the attached Tiangong-1 module continued to orbit together for another two weeks, and on Nov. 14, the spacecraft separated and then docked again for a second test of their rendezvous abilities.

China plans to conduct two more docking missions in 2012 with Tiangong-1, which is a prototype module for a Chinese space station. One of the next planned dockings will involve a manned Shenzhou spacecraft, Chinese officials said. Shenzhou-8 launched with two mannequins in spacesuits aboard.

The docking maneuvers are an important step for China’s developing space program. The nation is only the third country, after Russia and the United States, to independently launch humans to orbit.

China has stated its goal of building a manned Chinese space station by 2020. In order to construct such a facility, the ability to dock two spacecraft is a vital capability.