Author Topic: LIVE: Chang'e-2 (China's second lunar probe) - Long March 3C - October 1, 2010  (Read 124955 times)

Offline powerplay2009

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Zhou said the European Space Agency had provided tracing and monitoring support for Chang'e 2 during the six hours before the probe entered the shadow, when it was out of reach of China's monitoring stations.

interesting.

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Offline FabulousNASA

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http://news.xinmin.cn/rollnews/2011/05/17/10777705.html

Google translate:

Chief architect consultant: Chang'e II to complete the mission in June left the lunar moon

昨天,在首都师范大学第五届科技周的讲座上,中国科学院院士、我国深空探测首席科学家、嫦娥工程总设计师顾问叶培建透露,嫦娥二号将于6月中旬离开月球,飞向地球、太阳间的一个引力平衡点拉格朗日2号上继续进行探测。 Yesterday, the fifth in the Capital Normal University, lectures on Science and Technology Week, Chinese Academy of Sciences, China's deep space exploration chief scientist, chief designer of Chang'e Ye Peijian consultants said Chang'e II will be held in mid-June to leave the moon, fly to the earth, sun, a gravitational balance point between the 2nd Lagrangian continue to be detected.

此外,叶培建还透露,今年年底我国将公布目前世界上最清晰的7米分辨率的月球表面图。 In addition, Ye Peijian also revealed that China will announce the end of this year the world's most clear and present 7-meter resolution of the lunar surface.

目前状况 The current situation

顺利完成探月使命 The successful completion of the mission moon

叶培建介绍,嫦娥二号于去年10月1日发射,经过奔月、近月制动、绕月飞行、降轨控制等多个关键环节,开始在环月工作轨道上运行。 Ye Peijian introduced Chang'e II was launched on October 1 last year, after flying to the moon, in recent months, brake, lunar flight, control, track down a number of key areas, began to work in lunar orbit.

此后,卫星分别在100×100公里的圆轨道和100×15公里的椭圆轨道进行了高分辨率成像和环月探测。 Since then, the satellite at 100 × 100 km circular orbit, and 100 × 15 km elliptical orbit, the high resolution imaging and lunar exploration.

半年间,卫星系统、测控系统和地面应用系统精心组织开展了各项探测工作,严密监视卫星工作状态。 Six months, the satellite system, control system and ground application system of the well-organized exploration work carried out to closely monitor the work status of the satellite. 嫦娥二号卫星在轨运行状态良好,已经完整获取了7米分辨率的月球表面三维影像数据,并且一直按计划持续开展4项科学目标的探测活动。 Chang'e II satellite in orbit in good condition, has full access to a 7-meter-resolution lunar surface three-dimensional image data, and has been ongoing four planned target detection science activities.

截至今年4月1日,嫦娥二号已安全运行180天,达到了它半年的设计寿命,但是卫星燃料剩余仍然充足,工程各有关方面经过一个多月的研究论证,决定嫦娥二号探月使命告一段落,最终命运也已出炉。 As of April 1, Chang'e II has safely operated for 180 days, reached its half-year design life, but the satellite is still plenty of fuel remaining, engineering studies of all concerned demonstrated more than a month, decided to lunar mission Chang'e II come to an end, the final fate has been released.

Fate of the disclosure

将飞出地月环境“远嫁”他方 Months will be flying out to the environment "marrying" the other party

早在嫦娥二号发射之初,“二姑娘”的最终命运大致被设置为三种:一是对月球做补充探测,考虑卫星落月。 Chang'e II launch as early as the beginning, "the second girl," the ultimate fate of the roughly be set to three: First, to do additional exploration of the Moon, consider satellite sangrakwol. 二是让它飞向更远的太空,验证我国更远宇宙空间的深空探测能力。 The second is to make it fly farther in space, verification of the deep space beyond space exploration capabilities. 三是让它成为地球卫星。 Third, it became the Earth satellite.

在昨日的讲座上,叶培建透露,经过工程师们的论证,目前嫦娥二号的各项运行均正常,鉴于其目前已经很好地完成了探月任务,并且在整个过程中没有出现任何问题,所以决定在6月16号左右,让它离开月球,飞向拉格朗日点2号继续进行探测。 At yesterday's talks, Ye Peijian said, after the engineers of the argument, the current run Chang'e II are normal, given its now well lunar mission accomplished, and in the process without any problems, so decision about the June 16, it left the moon, fly to the Lagrangian point 2, to continue exploration.

叶培建解释,嫦娥二号处在这个拉格朗日点上,可与太阳和地球间的相对位置保持不变,所受到的太空中天体的引力影响也将减到最小,相对而言处于真正的失重状态,可以进行更多的探测和实验。 Ye Peijian explained Chang'e II at the Lagrangian point, with the sun and the relative position between the Earth and remain unchanged, the objects in space by the gravitational influence will be minimized, relatively speaking in the real weightlessness, can be more exploration and experiment.

权威发布 Authority issued

年底前公布世界最清晰月球图 Announced before the end of the world's most clear map the moon

叶培建透露,此次嫦娥二号探月任务中,一个重要的任务就是获取更清晰的月球表面图。 Ye Peijian said the lunar mission Chang'e II, an important task is to get more clear of the lunar surface.

目前全部图像的数据已经传回,科研人员正在进行数据的组合和三维图像的拼接。 At present all the image data has been returned, the researchers combined the data and the ongoing three-dimensional images of the mosaic. 如果没有意外,年底前,这幅目前世界上最清晰的月球图将公布,分辨率将精确到7米。 If there is no accident, by the end of this piece of the world's clearest moon map will be released, the resolution will be accurate to 7 meters.

而嫦娥一号曾成功完成了120米分辨率的全月图,此次根据嫦娥二号传回的数据制作的月球影像图,分辨率将提高近20倍,月球上的许多细节将更为具体。 The lunar probe has successfully completed a full month's 120-meter-resolution map, the Chang'e II according to the data returned by the production of lunar imagery, the resolution will increase nearly 20 times, many of the details on the moon would be more specific .

在讲座中,叶培建还着重介绍了我国未来深空探测的状况,表示如果有意愿,我国将可以在2025年到2030年间完成载人登月。 In the lecture, Ye Peijian also highlights the future deep space exploration of the situation, said that if there is will, by 2025 China will be completed between 2030 manned moon landing.

他还透露,2020年前后,我国将建成自己的空间站,这个空间站目前已经设定重量为60吨。 He also revealed that by 2020, China will build its own space station, the station is now set weighs 60 tons.

Background Links

嫦娥二号卫星:是嫦娥一号卫星的姐妹星,由长三丙火箭发射。 Chang'e II satellite: a satellite Chang'e sister stars, from long Sanbing rocket. 但是嫦娥二号卫星上搭载的CCD相机的分辨率更高,所探测到的有关月球的数据更加翔实。 But the Chang'e II CCD camera on board were higher resolution, the detected data is more informative about the moon. 它为嫦娥三号在月球软着陆做准备。 It Chang'e lunar soft landing in the preparation III.

嫦娥二号于2010年10月1日18时59分57秒在西昌卫星发射中心发射升空,并获得了圆满成功。 Chang'e II was at 18:59:57 on October 1st, 2010 at the Xichang Satellite Launch Center, and was a complete success.

名词解释 Glossary

拉格朗日点:是指受两大物体引力作用,能使小物体稳定的点。 Lagrangian points: the two objects is affected by gravity, small objects can make a stable point. 在该点处,一个小物体在两个大物体的引力作用下,小物体相对于两大物体基本保持静止。 In this point, a small object in the gravitational pull of two large objects, small objects relative to the two objects remained stationary.

每三个上述的物体之间都有5个拉格朗日点,其中2个稳定,3个不稳定。 Between each of the three above-mentioned objects are five Lagrangian points, including 2 stable, 3 unstable. (李莎莎王璐) (Li Shasha Wang Lu)


Offline Satori

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Offline jcm

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Chang'e 2 should be approaching L2 by now, has there been any Chinese report?
-----------------------------

Jonathan McDowell
http://planet4589.org


Offline Satori

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Online plutogno

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what next for CE-2?
according to the Google translation of this interview (in Chinese) http://news.xinhuanet.com/politics/2011-09...c_122063243.htm it will remain at L2 until the end of next year. Then, depending on the remaining fuel it may fly to the Sun-Earth L1 point, flyby a near Earth asteroid or comet, or return to the Moon
I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen

Offline Satori

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Offline HappyMartian

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what next for CE-2?
according to the Google translation of this interview (in Chinese) http://news.xinhuanet.com/politics/2011-09...c_122063243.htm it will remain at L2 until the end of next year. Then, depending on the remaining fuel it may fly to the Sun-Earth L1 point, flyby a near Earth asteroid or comet, or return to the Moon

How much "remaining fuel" would be needed for a flyby of 2012-DA14? Is such a flyby mission worth considering?

I just saw in the news the discovery of a new Earth-Grazing NEO in the Tunguska-class (~50m diameter).

Link to Article
.....

Thoughts and comments?


"The Chang'e-2 is now on an extensive exploration mission some 1.5 million km from Earth. Ye said it is in good condition and scientists are planning its next stage.

"'It could fly toward the Earth to test returning orbit for future spacecraft or travel farther to explore an asteroid, he said."
   
From: Mission to bring back lunar soil  By Xin Dingding (China Daily)
At: http://europe.chinadaily.com.cn/china/2012-03/16/content_14845488.htm

Would it be feasible and worthwhile for Chang'e-2 to do a close high speed flyby reconnaissance mission to 2012 DA14?

Is it feasible and worthwhile to use any other robotic spacecraft to do such a close high speed flyby reconnaissance mission?

Cheers!


:)

"The Moon is the most accessible destination for realizing commercial, exploration and scientific objectives beyond low Earth orbit." - LEAG

Online Galactic Penguin SST

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Well this is surprising..... CE-2 has already left the SE-L2 point in April to make a fly-by of an asteroid in January 2013!  :o (initial reports points to asteroid 3179 Beruti, but I don't think that's possible, given that it's well into the asteroid belt)

Source

Edit: apparently the survey target is actually 4179 Toutatis. The original source was from a China Academy of Science meeting this morning, where lunar scientist Ouyang Ziyuan made a report on the future of China's plan for solar system exploration. He also mentioned a possible mission to the infamous 99942 Apophis in around 2020.
« Last Edit: 06/14/2012 08:07 AM by Galactic Penguin SST »
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online plutogno

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GREAT NEWS IF TRUE!!! thanks for diggin it out...
here I am hoping they got confused with NEO (4179) Toutatis! http://en.wikipedia.org/wiki/4179_Toutatis
I have been waiting to see Toutatis up close ever since radar images were released 20 years ago!
I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen

Online Galactic Penguin SST

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GREAT NEWS IF TRUE!!! thanks for diggin it out...
here I am hoping they got confused with NEO (4179) Toutatis! http://en.wikipedia.org/wiki/4179_Toutatis
I have been waiting to see Toutatis up close ever since radar images were released 20 years ago!

I don't believe CE-2 has enough propellant to make a fly-by of the main asteroid belt, and the forum member said that he couldn't exactly remember the asteroid number, so I think this is it!

Can anyone here help to see how much delta-v is needed to make a flyby of Toutatis?
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online plutogno

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dunno. anyway, according to jpl's horizon ephemeris generator, Toutatis is having a close (0.046 AU, 6.9 M km) flyby of Earth in mid-December this year. I don't expect the delta-v for a flyby to be very high
I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen

Online plutogno

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don't forget that Toutatis was to have been the target of the DoD Clementine 2 mission, which would have fired a couple of missile interceptors at it
I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen

Online plutogno

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finally, I was wondering whether the Chinese have developed a moving target tracking algorithm to collect any data from the flyby or they will have to image all of the uncertainty volume of the asteroid in order to be sure of capturing it as Galileo did at Gaspra and Ida. any idea?
of course such software is not needed for a lunar orbiter...
I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen

Online Galactic Penguin SST

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Well this is surprising..... CE-2 has already left the SE-L2 point in April to make a fly-by of an asteroid in January 2013!  :o (initial reports points to asteroid 3179 Beruti, but I don't think that's possible, given that it's well into the asteroid belt)

Source

Edit: apparently the survey target is actually 4179 Toutatis. The original source was from a China Academy of Science meeting this morning, where lunar scientist Ouyang Ziyuan made a report on the future of China's plan for solar system exploration. He also mentioned a possible mission to the infamous 99942 Apophis in around 2020.

A video of the meeting can be found here: http://www.cas.cn/zt/hyzt/16thysdh/zb/

It shows that CE-2 has left the SEL2 point on April 15, and has set up a trajectory towards Toutatis. The fly-by is scheduled on January 6, 2013.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline apace

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I'm surprised about the advancement the chinese had done... have seen such mission changes at US probes only.

Online Galactic Penguin SST

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Well this is surprising..... CE-2 has already left the SE-L2 point in April to make a fly-by of an asteroid in January 2013!  :o (initial reports points to asteroid 3179 Beruti, but I don't think that's possible, given that it's well into the asteroid belt)

Source

Edit: apparently the survey target is actually 4179 Toutatis. The original source was from a China Academy of Science meeting this morning, where lunar scientist Ouyang Ziyuan made a report on the future of China's plan for solar system exploration. He also mentioned a possible mission to the infamous 99942 Apophis in around 2020.

A video of the meeting can be found here: http://www.cas.cn/zt/hyzt/16thysdh/zb/

It shows that CE-2 has left the SEL2 point on April 15, and has set up a trajectory towards Toutatis. The fly-by is scheduled on January 6, 2013.

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

12711 Turkmit in August 2018
99942 Apophis between April and September 2020
175706 (1996 FG3) in between August and December 2023

All three are Apollo asteroids.

Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline Moe Grills

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Good of the Chinese to get 'more bang for their buck' with CE-2.
JPL and JHUAPL have a lengthy track record of getting bonus missions
out of their spacecraft; it's good to see that the Chinese are taking that
route too.
 If the flyby of Toutalis is successful, the CE-2 should return more than
eye candy. There are gravitometric experiments that can be done; and
if the non-optical science instruments are working well, we should also get back fields and particles data too.

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