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Astrojensen
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Re: China Spacecraft to land on Moon Dec-14 new [Re: azure1961p]
      #6252089 - 12/14/13 03:24 AM

Quote:

The 150mm telescope is an onboard Nexstar 6SE




Really?


Clear skies!
Thomas, Denmark


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mhilscher
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Re: China Spacecraft to land on Moon Dec-14 new [Re: azure1961p]
      #6252205 - 12/14/13 07:36 AM

thank you stephen..great update

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Stellarfire
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Reged: 07/10/11

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Re: China Spacecraft to land on Moon Dec-14 new [Re: echoes1961]
      #6252347 - 12/14/13 09:49 AM

Update - Chang'e-3 has landed.

The unmanned Chang'e-3 spacecraft successfully landed at just before 9.15pm Beijing time, according to Chinese state media. It landed on the Moon, state media announced in a live broadcast on Saturday night.

See here for the news in The Telegraph.

The Planetary Society shows first pictures & video frames (b/w and colour).
Landing location in Sinus Iridum is stated at 19.51 west, 44.12 north.

Congrats to China for soft touchdown on Moon!

Stephan

Edited by Stellarfire (12/14/13 10:41 AM)


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btb
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Reged: 07/07/06

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China Spacecraft Landed on Moon Dec-14 new [Re: Stellarfire]
      #6252407 - 12/14/13 10:27 AM

It was interesting to watch.

Edited by btb (12/14/13 10:28 AM)


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photonovore
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Re: China Spacecraft Landed on Moon Dec-14 new [Re: btb]
      #6252668 - 12/14/13 01:19 PM

I'll be looking forward to the data they gather. (Oh, yeh...nevermind, they're Chinese, not NASA.)

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mich_al
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Re: China Spacecraft to land on Moon Dec-14 new [Re: Stellarfire]
      #6252703 - 12/14/13 01:41 PM

Quote:

Landing location in Sinus Iridum is stated at 19.51 west, 44.12 north.




Is that location accurate? My 'Virtual Moon Atlas' show that to be well outside of Sinus Iridum.


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The Mighty Mo
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Reged: 10/12/13

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Re: China Spacecraft to land on Moon Dec-14 new [Re: mich_al]
      #6252762 - 12/14/13 02:16 PM

Yeah same here. It shows it being just south and east of crater AVL44219N339570, mostly in the northern-middle of Mare Imbrium. Not even close to Sinus Iridum.

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Stellarfire
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Reged: 07/10/11

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Re: China Spacecraft to land on Moon Dec-14 new [Re: mich_al]
      #6252774 - 12/14/13 02:21 PM

Apparently Chang'e-3 did not land at the original target (which was inside the bay of Sinus Iridum), but an estimated 160km east in the frontier region shared between Mare Imbrium and Sinus Iridum.

The preliminary official landing coordinates 44.12N, 19.51W (340.49E) as cited in my previous post above are correct. The landing site is located between Montes Recti and Le Verrier crater, perhaps 44 km south by southeast of Laplace F crater, or 160 km east by northeast of Laplace A.
Source


Stephan


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Astrojensen
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Re: China Spacecraft to land on Moon Dec-14 new [Re: Stellarfire]
      #6252777 - 12/14/13 02:24 PM

It did get down safely, that's the most important part.


Clear skies!
Thomas, Denmark


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mich_al
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Re: China Spacecraft to land on Moon Dec-14 new [Re: Stellarfire]
      #6252839 - 12/14/13 02:54 PM

Stephan
Thanks for the update. I hadn't heard that the landing location had changed.
Al


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SaberScorpX
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Re: China Spacecraft to land on Moon Dec-14 new [Re: mich_al]
      #6253432 - 12/14/13 09:07 PM

rover rollout and other footage: http://moonandback.com/

chang'e looks back at earth (avi.): http://videobam.com/users/ssx


peace,
stephen


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brianb11213
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Re: China Spacecraft to land on Moon Dec-14 new [Re: Stellarfire]
      #6253892 - 12/15/13 05:56 AM

Quote:

Apparently Chang'e-3 did not land at the original target (which was inside the bay of Sinus Iridum), but an estimated 160km east in the frontier region shared between Mare Imbrium and Sinus Iridum.

The preliminary official landing coordinates 44.12N, 19.51W (340.49E) as cited in my previous post above are correct. The landing site is located between Montes Recti and Le Verrier crater, perhaps 44 km south by southeast of Laplace F crater, or 160 km east by northeast of Laplace A.
Source




So, they've missed the wrinkle ridges. Maybe someone tipped them off about a monk with a can of petrol waiting at the intended landing site?

Seriously, though, I do respect the Chinese space project.


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echoes1961
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Reged: 09/14/12

Re: China Spacecraft to land on Moon Dec-14 new [Re: brianb11213]
      #6254426 - 12/15/13 12:43 PM

Nice...Everything seems to be going as planned.

http://www.xinhuanet.com/english/special/change3/

I wonder what the icy cold of space with do to the space crafts when the sun goes down? It will be like 250 below zero on the dark side of the moon. I'm sure they're prepared. Of course right now it's 250 F. Just saying.


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MawkHawk
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Re: China Spacecraft to land on Moon Dec-14 new [Re: echoes1961]
      #6254531 - 12/15/13 01:39 PM

http://moonandback.com/ is saying that the spacecraft itself chose the final landing site because the original site turned out to not be flat enough. Whether that is true or if was a mistake, who knows... Still, an impressive feat for China, but been there, done that for most of the developed world...

Edited by MawkHawk (12/15/13 06:24 PM)


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brianb11213
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Re: China Spacecraft to land on Moon Dec-14 new [Re: MawkHawk]
      #6254559 - 12/15/13 01:56 PM

Quote:

an impressive feet for China, but been there, done that for most of the developed world...



There are a couple of really interesting things about this mission: firstly the ground penetrating radar, which hasn't been deployed anywhere except earth before. Secondly the size relationship of the rover to the lander is peculiar, it's obvious that the same landing platform could cope with a much larger payload. Maybe the Chinese don't have the heavy lifting capability (yet) but I wouldn't be at all surprised to see this lander develop into the base for much more serious missions.

As for "most of the developed world": only the Soviet Union has deployed robotic lunar rovers, no-one else except the USA has ever soft landed anything on the moon before & (excluding crashes) this is the first lunar landing of any kind since 1976. I don't think it's fair or reasonable to write this mission off as a "me too"; at a minimim it's demonstrating a capability that we may no longer have, and any any case can't be bothered to demonstrate any more.

I don't know whether I'll live long enough to see it, but I'll be very surprised if the 13th human to set foot on the moon isn't Chinese.


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brianb11213
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Re: China Spacecraft to land on Moon Dec-14 new [Re: echoes1961]
      #6254567 - 12/15/13 02:05 PM

Quote:

I wonder what the icy cold of space with do to the space crafts when the sun goes down? It will be like 250 below zero on the dark side of the moon. I'm sure they're prepared. Of course right now it's 250 F. Just saying.



Keeping the thing cool is far more of an issue than the extreme cold of the linar night ... electronics like the cold. In any case there's no reason to suppose that the thing isn't using the same sort of technology that has been used on many space probes and landers launched by other coutries, i.e. a Pu238 heat generator.


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brianb11213
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Re: China Spacecraft to land on Moon Dec-14 new [Re: MawkHawk]
      #6254577 - 12/15/13 02:11 PM

Quote:

http://moonandback.com/ is saying that the spacecraft itself chose the final landing site because the original site turned out to not be flat enough. Whether that is true or if was a mistake, who knows...



They landed "early" implying a commanded change of landing site.

The landing module does have a unique capability to select its landing site if it discovers bad terrain but according to the pre-landing information this only applies in the last few hundred metres of the descent. No lander launched at any target by any other country has had this capability, except the manual overrride mode on the Apollo landers.

Anyhow this is another illustration of a clever technology ... many of the successful US moon & mars landers have had close calls with terrain at the landing site, more than half of the missions could easily have been lost be straddling boulders at the landing site.


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azure1961p
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Re: China Spacecraft to land on Moon Dec-14 new [Re: brianb11213]
      #6254931 - 12/15/13 05:54 PM

Brian,

All good points. I'm curious though- what is the capability we might not have anymore that the mission from China has shown. I'm enjoying this whole thing quite a lot - and Id love to see an astronaut from there set foot on the moon. I don't see how anything they've done or intend to is beyond our capability though. Curiosity for example.


Pete


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MawkHawk
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Re: China Spacecraft to land on Moon Dec-14 new [Re: azure1961p]
      #6254997 - 12/15/13 06:33 PM

Yeah, did not the U.S. just land a car-sized rover on Mars and 2 others previously? And the ESA landed Huygens on Titan not too long ago.

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contrailmaker
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Reged: 01/02/09

Re: China Spacecraft to land on Moon Dec-14 new [Re: azure1961p]
      #6255018 - 12/15/13 06:44 PM

+1 Pete. Although I seriously doubt China is going to spend the few trillion it would take to put people on the Moon.

CM

Edited by contrailmaker (12/15/13 06:49 PM)


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