HELSINKI – The nuclear & # 39; & # 39 Chang e 4 & # 39; space and the Rover China entered b & # 39; successful lunar orbit Wednesday (12 & # 39; December) after flight & # 39; four & # 39; day and a half to the moon.
The spacecraft came in & # 39; elb polar elliptical lunar b & # 39; of & # 39 perilun, 62 miles (100 kilometers) at 3:45 a.m. EST (0845 GMT) 12 & # 39; December following issue & # 39; insertion & # 39; lunarja orbit.
The single primary variable explosive shot of the Space f & # 39; 80 miles (129 km) & # 39; away from the moon after the release of & # 39; command from the & # 39; Aerospace Command and Control Center & # 39; Beijing (BACC) at 3:39 a.m. EST (0839 GMT). [China’s Chang’e 4 Moon Far Side Mission in Pictures]
The Project & # 39; Lunar Exploration of China (CLEP) announced the success of the crucial maneuver braking within minutes and confirmed that the spacecraft was working well and will begin preparations for testing & # 39 ; communication with & # 39; satellite radio and refine its orbit.
Chang & # 39; e 4 rocket launched from & # 39; Long March 3B carrier by Center & # 39; Launch Satellite & # 39; Xichang, in southwest China, at 1: 23 p.m. EST (1823 GMT) on 7 & # 39; December trip to & # 39; 110 hours to the moon.
Planned three maneuvers & # 39; correction & # 39; trajectory for orbital phase of the lunar transfer, but only one was required, carried out by 9 & # 39; in December, the first and last maneuvers considered unnecessary and therefore canceled.
Consisting of Lander and Rover, the spacecraft try first soft landing on the other side of the moon – that due to tidal locking never faces the Earth – in early 2019.
The consignor and Rover are equipped with & # 39; cameras and science loads to analyze the geology of the lunar surface and the surface & # 39; under the surface, solar wind interactions and perform observations radio & # 39; low frequency radio only in a quiet environment on the other side of the moon.
The communications with the spacecraft will be facilitated by satellite relay & # 39; Queqiao & # 39; launched in & # 39; May and subsequently entered into & # 39; Orgun the halo around the second Lagrange point of the Earth-Moon, 53.000 up about 40,000 miles (65,000 up 85,000 kms) away from the moon.
The remote landing and science
The descent will be directed to the sites & # 39; landing candidates in the southern Basin Pole-Aitken (SPA), with the understanding chosen site, but not officially announced, as the krater Von Kármán a & # 39; 116 miles.
The Pole-Aitken Basin t & # 39; South is the old krater impact & # 39; 1,550 km, which is 7.5 miles (deep) of & # 39; 7.5 miles (12 km) can & # 39; containing material exposed the mantle & # 39; on the moon and a hint of the history and development of the moon.
James Head, a planetary scientist at the World Department of Earth, Environmental and Planetari Sciences & # 39; Brown University in & # 39; P Providence, Rhode Island, told SpaceNews that instruments such as the lunar penetrating radar, and on the previous mission of China Chang & # 39; e 3 moon, will provide images of the lunar soil of the layer structure and any unit flow of lava beneath the surface, and any intertrata soil, and " help us understand the three-dimensional nature and surface units' range.
Chief stated that the payload Visible and Near Infrared Imaging Spectrometer (VNIS) is & # 39; very great interest and will allow comparisons between mineralogy floor of the southern basin Pole-Aitken to close units help answer questions such as, Did-the impact of the South Pole-Aitken Basin penetrating the lunar mantle?
No official date has been released to attempt & # 39; landing from landing motor, but the Aerospace Science and Technology Corporation of China (CASC), the main contractor for the Chinese space program , indicated shortly after the launch to the landing will be held in the first days & # 39; In January 2019, after sunrise on the main master & # 39; landing within the krater of & # 39; Von Kármán f & # 39; late December.
Chang & # 39; e 4 was originally planned as a backup for mission & # 39; aircraft and Chang Rover & # 39; e 3, which at & # 39; December 2013 made China the third country to get soft landing on the lunar surface and the first of the Luna 24 & # 39; the Soviet Union in 1976.
The Lander has a dry mass of & # 39; 2650 pound. (1,200 kilograms) and carrying the 310-lb. (140 kg) Rover. During the launch, when loaded with propellant, the vehicle was spaced weighs about 8380 lbs. (3,800 kg).
The Chang mission & # 39; e 4 shall be followed by the first mission of the return of China, Chang & # 39; e 5, you can & # 39; launch at the end of 2019 on rocket & # 39; March 5.
This story was supplied by SpaceNews, dedicated to cover all aspects & # 39; industry & # 39; space.