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Chang'e 5 sample return mission
nprev
post Nov 2 2014, 03:47 AM
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Really! That's unexpected, and very interesting. What are the objectives of these maneuvers, Yeh? I'm guessing navigation practice and additional systems testing.


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Paolo
post Nov 2 2014, 07:04 AM
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the L2 extension clearly shows that they are considering a farside landing mission for the future, for which a relay at the L2 would be almost necessary.
in fact, are there any hint of the extension of the unmanned Chang'e program beyond CE-6?
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Phil Stooke
post Nov 2 2014, 02:39 PM
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I have not heard of any extension. Conceivably Chang'E 4 could be targeted to the far side, becoming the first landing ever in that hemisphere.

Phil



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Yeh
post Nov 2 2014, 04:57 PM
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QUOTE (nprev @ Nov 1 2014, 10:47 PM) *
Really! That's unexpected, and very interesting. What are the objectives of these maneuvers, Yeh? I'm guessing navigation practice and additional systems testing.


According to the report, it is for "verification of navigation/control technique of the Chang'e 5 mission".

Re Paolo -- interesting, I am seeing discussion on 9ifly.cn (a forum comparable to unmannedspaceflight.com in China) that also speculating that Chang'e 5 or 6 may be targeting the far side of the Moon. There are some calculations that seems to conclude that it is possible to achieve this with CZ5 launch system. Link (in Chinese): http://bbs.9ifly.cn/forum.php?mod=viewthre...ge=19#pid331129
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elakdawalla
post Nov 3 2014, 05:22 PM
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QUOTE (Phil Stooke @ Nov 2 2014, 06:39 AM) *
I have not heard of any extension. Conceivably Chang'E 4 could be targeted to the far side, becoming the first landing ever in that hemisphere.

THAT WOULD BE SO AWESOME. Even more awesome would be if they could send Chang'e 5 there. That would catapult the Chang'e program from following in the footsteps of past exploration to performing next steps beyond what anybody has done before.

But they targeted Chang'e 3 based on Chang'e 1 and 2 high-res imaging of the landing site. They wouldn't have high-res imaging of the far side, would they? Of course there is all the American and Japanese data to work with...


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Phil Stooke
post Nov 3 2014, 09:41 PM
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Chang'E 2 only obtained the very high resolution images of its landing area around Sinus Iridum. Originally I thought that limited missions 4, 5 and 6 to that area, probably two rovers and then two sample returns in the two very distinct mare units.

Since then there have been rumors that the next landing site and the first sample return might be in Oceanus Procellarum (my guess: in the youngest mare basalt region south of Aristarchus Plateau). Now we hear about the far side. It would be a great thing to do, but I can't imagine it being the first sample return. So maybe that's a more suitable destination for Chang'E 6.

Phil


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A.Nemo
post Nov 10 2014, 12:22 PM
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SASTIND have released a new photo of earth and moon
when CE5T1 taken this photo, earth was 540000km away and moon was 920000km away
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A.Nemo
post Nov 29 2014, 08:55 AM
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http://china.cnr.cn/gdgg/201411/t20141129_516922801.shtml

according to CNR, CE5T1 have been inserted earth-moon lagrangian point-2 on november 27,2014

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Paolo
post Dec 3 2014, 06:39 AM
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this xinhua article discusses future plans for CE5T1:
http://news.xinhuanet.com/tech/2014-12/02/c_1113493000.htm

from Google translate:

QUOTE
in early January 2015 the service module will leave the Earth-Moon L2 point of flying to the moon; the middle of recent months, brake, forming lunar orbit; February, March each conduct a lunar orbit rendezvous and docking Remote Pilot test; April-to-Moon imaging, shooting preset sampling landing zone topography.
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Phil Stooke
post Dec 3 2014, 02:53 PM
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" lunar exploration phase III reentry return flight test (referred to as "Dumbo" )"

What? Not an homage to the flying elephant, presumably... I wonder what it means.

Phil


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Paolo
post Dec 3 2014, 03:04 PM
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If I understand correctly, the probe has been nicknamed Xiaofei (小飞) in Chinese, meaning "little fly", or maybe "little flyer". and that's also the Chinese name of Disney's Dumbo
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Phil Stooke
post Dec 3 2014, 03:57 PM
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Ah... that's the connection. Very interesting!

Phil


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Thorsten Denk
post Jan 6 2015, 09:21 AM
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Cháng'é-5 T1 (or what's remaining from it)
has left Earth-Lunar L2 and returns to moon orbit.

www.globaltimes.cn

Thorsten
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Cosmic Penguin
post Jan 6 2015, 02:35 PM
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In summary:

CE-5-T1 left EM-L2 at around 15:00 UTC on Jan. 4 and is scheduled to reach lunar orbit by mid-January. As of midnight UTC on Jan. 5 the spacecraft is 445000 km from Earth and 57000 km from the Moon.

Earlier reports state that it will do at least 2 things in lunar orbit. In February and March it will perform 2 "virtual target" rendezvous tests for the future CE-5 mission (not unlike how the Shuttle did "dummy rendezvous" tests in the 1980s). In April the small monitoring camera will be used to obtain higher resolution photos of CE-5's landing zone.


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Cosmic Penguin
post Jan 11 2015, 05:29 AM
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And CE-5-T1 has entered lunar orbit yesterday at around 19:00 UTC - initial orbit is 200 x 5300 km with period of 8 hours. It will make 2 more burns over the next 2 days to lower its orbit to a 200 km circular one with period of 127 minutes.

Source: http://www.chinanews.com/gn/2015/01-11/6956390.shtml


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