12711 Turkmit in August 2018

The video shows that the possible targets for the planned Chinese asteroid fly-by mission are as follows:

(3) 小行星探测任务一、首次近地小行星探测任务：精确确定小行星轨道和相关特性，评估其撞击地球可能；同时开展科学探测研究。探测目标 | 物理参数 | 探测方式 | 探测时间-----------------------------------------12711号 (Tukmit, 1991 BB) | 光谱型:X/直径:X/自转周期:X | 飞越探测 | 2018.899942号 (Apophis, 2004 MN4) | 光谱型:X/直径:X/自转周期:X | 伴飞探测 | 2020.4 - 2020.9175706号 (1996 FG3) | 光谱型:X/直径:X/自转周期:X | 伴飞探测 | 2023.8 - 2023.12二、第二次小行星探测 — 主带小行星采样返回探测

(3) Asteroid exploration mission(s)1. First time near-Earth asteroids exploration mission(s):- Precisely determine asteroid orbit and related features,- Evaluate their possibilities hit the Earth; And perform- Scientific exploration researchExploration target | Physical parameters | Exploration method | Exploration time-----------------------------------------12711 Tukmit | Spectral type: X / Diameter: X / Rotation period: X | Flyby exploration | August 201899942 Apophis | Spectral type: X / Diameter: X / Rotation period: X | Rendezvous exploration | April 2020 – September 2020175706 (1996 FG3) | Spectral type: X / Diameter: X / Rotation period: X | Rendezvous exploration | August 2023 – December 20232. Second time asteroid exploration — Main-belt asteroid sample return exploration

Re: plutogno1. Yes.2. Rui is wrong.

Trajectory design for the Moon departure libration point mission in full ephemeris modelThe lunar probe may still have some remaining fuel after completing its predefined Moon exploration mission and is able to carry out some additional scientific or technological tasks after escaping from the Moon orbit. The Moon departure mission for the lunar probe is the focus of this paper. The possibility of the spacecraft orbiting the Moon to escape the Moon's gravitational pull is analyzed. The trajectory design for the Earth-Moon system libration point mission is studied in a full ephemeris dynamical model, which considers the non-uniform motion of the Moon around the Earth, the gravity of the Sun and planets and the finite thrust of the onboard engine. By applying the Particle Swarm Optimization algorithm, the trajectory design for the transfer from the Moon-centered orbit to the L1 halo orbit, the station-keeping strategies for the Earth-Moon halo orbit and the construction of homoclinic and heteroclinic orbits are investigated. Taking the tracking conditions and engineering constraints into account, two feasible schemes for the Moon departure libration point mission for the lunar probe are presented.

Design and optimization of a trajectory for Moon departure Near Earth Asteroid explorationThe lunar probe often has some remaining fuel on completing the predefined Moon exploration mission and may carry out some additional tasks from the Moon orbit using the fuel. The possibility for the lunar probe to escape from the Moon and the Earth is analyzed. Design and optimization of the trajectory from the Moon orbit to the Near Earth Asteroids (NEAs) using the spacecraft’s residual fuel is studied. At first, the semi-major axis, inclinations and the phase relations with the Earth of all the numbered NEAs are investigated to preliminarily select the possible targets. Based on the Sun-centered two-body problem, the launch window and the asteroid candidates are determined by calculating the minimum delta-v for two-impulse rendezvous mission and one-impulse flyby mission, respectively. For a precise designed trajectory, a full ephemeris dynamical model, which includes gravities of the Sun, the planets and the Moon, is adopted by reading the JPL ephemeris. The departure time, arrival time, burning time duration and thrust angles are set as variables to be designed and optimized. The optimization problem is solved via the Particle Swarm Optimization (PSO) algorithm. Moreover, two feasible NEA flyby missions are presented.

at last the story has been picked up by Chinese news sites!http://tech.sina.com.cn/d/2012-06-27/14427317706.shtmlnothing new as far as I can tell from the Google translation, beside the first mention of a planned flyby distance of 1000 km. I also find it interesting that they mention a flyby near the end of this year or early next year, as if the date was not yet fixed

去年6月9日，“嫦娥二号”再次开始新的旅程，奔向150公里的拉格朗日2点；欧阳自远介绍，“嫦娥二号”于2012年4月15日受控飞翔距离地球大约1000千米深邃的太阳系空间“嫦娥二号”搭载的CCD相机如果以1000公里的距离飞越4179号小行星

thanks for your input yaohua2000!actually, on 6 Jan 2012 Toutatis will be 28.2 million km from Earth, and even on its closest approach to Earth in December it will be no closer than 6.9 million km. I have seen the distance of 1 million km in other reports, but I don't understand what it is supposed to mean...