China to the Moon - Chang'e program, Chinese unmanned lunar mission |
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China to the Moon - Chang'e program, Chinese unmanned lunar mission |
 Oct 6 2010, 04:30 AM
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#151
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 Senior Member  Group: Moderator Posts: 6474 Joined: 8-December 05 From: Los Angeles Member No.: 602  |
Congratulations to CSNA & the people of China!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 6 2010, 01:40 PM
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#152
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Member Group: Members Posts: 301 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
QUOTE (yaohua2000 @ Oct 5 2010, 11:17 PM)  The 490-Newton thrust main engine started at 03:05:59 UTC, burned for 1942 seconds. Chang'e 2 is now in lunar orbit at an altitude of 100 km. To be precise, Chang'2 entered a preliminary 12-hour orbit. Two more adjustments are needed before it reaches the 100-km working orbit. http://news.xinhuanet.com/english2010/chin.../c_13544216.htm |
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Oct 25 2010, 03:55 PM
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#153
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
Chang-e 2 has been operating in its 100 km circular orbit for a while, probably testing its instruments and maybe collecting some data. Yesterday it began testing the camera system, and tomorrow it will drop into its 100 by 15 km low pass over Sinus Iridum for the first time.
This from a report in the People's Daily today. Phil -------------------- ... because the Solar System ain't gonna map itself.
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Oct 25 2010, 04:51 PM
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#154
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 Bloggette par Excellence Group: Admin Posts: 3963 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Link please Phil?
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Oct 25 2010, 05:09 PM
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#155
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... because the Solar System ain't gonna map itself.
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Oct 27 2010, 03:57 AM
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#156
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
http://english.people.com.cn/90001/90776/90881/7178577.html
The spacecraft is in its 100 by 15 km orbit and will image Sinus Iridum tomorrow (Wednesday) Phil -------------------- ... because the Solar System ain't gonna map itself.
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Oct 27 2010, 05:15 AM
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#157
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 Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
this time they seem even less willing to release pics than they were with CE-1
-------------------- 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 |
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Oct 27 2010, 10:54 AM
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#158
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 Member Group: Members Posts: 964 Joined: 26-July 08 Member No.: 4270 |
Have they taken any yet?
We're told that imaging of the landing site will be today. There may simply not be much to release yet. -------------------- -- Hungry4info (Sirius_Alpha)
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Oct 27 2010, 01:14 PM
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#159
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
Right - as I understand it there are only test images so far. This is not a global mapping mission (with the camera, maybe it is with the other instruments), it is intended to focus on specific future landing sites. So Chang-e 2 has dropped into its lower perilune orbit for a short imaging period, maybe only a few orbits. Then I assume they will raise perilune again and wait until the groundtrack crosses another target under good lighting conditions, drop it again and so on. They have lots of fuel, so they can presumably do several of these sessions. Presumably the target areas will also be imaged under optimal lighting conditions from 100 km for wider coverage at intermediate resolution.
No word yet on the suggested impactor. A page on technical innovations referred to a 'landing camera', which might be part of it. Phil -------------------- ... because the Solar System ain't gonna map itself.
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Oct 27 2010, 05:41 PM
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#160
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Bloggette par Excellence Group: Admin Posts: 3963 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Got this via email today from Yong-Chun Zheng at National Astronomical Observatories, Chinese Academy of Sciences
QUOTE Chang'E-2 lunar probe has entered into the 100km x 15km orbit, and begun to take photo for Bay of Rainbows.
Engineers of Beijing Aerospace Command & Control Centre (BACC) have maneuvered Chang'E-2 into the 100km x 15km orbit in the night of 26, Oct, 2010 (Beijing Local Time). BACC is the commanding, decision-making and control centre of the key space flight missions in China. This action of Chang'E-2 was begun at the farside of the Moon, and reqiure high accuracy of orbit control. In the 100km x 15km orbit, Chang'E-2 is taking images for the Sinus Iridum, or Bay of Rainbows, where will be selected as the site for the soft landing of Chang'E-3. In the future several days, Chang'E-2 will obtain high resolution images of this regions. After taken photoes for Sinus Iridum, Chang'E-2 will go back to the 100km x 100km orbit, where it will stay for half a year to explore the lunar surface. -------------------- |
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Nov 3 2010, 02:29 PM
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#161
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
Latest news - Chang-e 2 has been raised to its long term orbit and will now do more imaging and other mapping from that altitude. No more news on the low altitude results yet. I had assumed they would repeat the low altitude imaging elsewhere but apparently not, as Emily's reported email had also said. We'll learn more later... too bad it's so slow coming out.
Phil (still at the Cape hoping for a Friday launch, assuming Thursday will be prevented by bad weather) -------------------- ... because the Solar System ain't gonna map itself.
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Nov 3 2010, 04:49 PM
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#162
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Senior Member Group: Moderator Posts: 6474 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Thanks for the update, Intrepid Correspondent, and best of luck on your launch!
Interesting. So have they completely ruled out any future low-alt passes now? -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Nov 5 2010, 08:29 PM
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#163
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
The paper Chang'E-1 lunar mission: an overview and primary science results is available for free on the website Chinese Journal of Space Science. I am not sure that there is anything new in there
-------------------- 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 |
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Nov 8 2010, 12:02 PM
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#164
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
http://news.xinhuanet.com/english2010/chin.../c_13596211.htm
Finally! A report with image and coordinates. No word on that rumor of an impact probe. Phil -------------------- ... because the Solar System ain't gonna map itself.
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Nov 8 2010, 02:30 PM
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#165
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Senior Member Group: Members Posts: 4513 Joined: 5-April 05 From: Canada Member No.: 227 |
Higher resolution versions of the same images here at People's Daily:
http://english.people.com.cn/90001/90776/90881/7191608.html Phil -------------------- ... because the Solar System ain't gonna map itself.
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