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Chang'e 3: Lunar Day 3 and onwards, Ongoing discussion of the Rover/Lander mission
Phil Stooke
post Oct 6 2015, 03:17 AM
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New official IAU names for the landing site and the three nearby craters.

Phil

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elakdawalla
post Oct 6 2015, 03:24 AM
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Neat! Can you point to links/citations for these?


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Phil Stooke
post Oct 6 2015, 10:56 AM
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The landing site name is from here:

http://planetarynames.wr.usgs.gov/Feature/15415

The crater names are shown on the USGS/IAU Planetary Nomenclature website map at:

http://planetarynames.wr.usgs.gov/images/L.../lac_24_wac.pdf

The crater names are also listed in a table I posted on the Yutu route map thread, with their meanings.


Phil



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John Moore
post Oct 7 2015, 09:59 AM
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Phil

If it's of any use, I was on to Rosylyn at the IAU yesterday inquiring about location-markers (say, coordinates, photo, map-locations) for the three features (features, just in case, we may not be dealing with craters alone), and she's looking into getting any markers, if possible, for me. Will post here if anything pop's up today, else, Emily might come up with something.

John
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Phil Stooke
post Oct 7 2015, 02:25 PM
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Hi John - the features are craters, and this map identifies them using a translation of the names. This is from the paper I cited in the Yutu route map thread.

Phil

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Phil Stooke
post Oct 7 2015, 04:27 PM
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And via a tweet by Emily and this link:

http://arxiv.org/abs/1510.01435

comes news that the UV telescope is not only still working, but regularly returns 10000 images per month.


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John Moore
post Oct 7 2015, 07:38 PM
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Thanks, Phil.

Rosalyn did get back to me, and it looks like those marked are the craters - she also supplied the coordinates, which might suit (below).

The first two coordinate columns are those given to the IAU on request for high resolution imagery, while the last two columns are those measured by Rosylyn to suit low resolution imagery in IAU images (these coordinates will be truncated for the online Gazateer, I'm told). There will obviously be some discrepency with the high-rez versus the low-rez measurements. Much thanks goes out to Rosalyn for her work.

Name of Crater/ Latitude listed on name request/ Longitude listed on name request / Latitude measured by Rosalyn on low res image/ Longitude measured by Rosalyn on low res image/
Zi Wei/ 44.120115/ -19.524594/ 44.121780/ -19.519958/
Tian Shi/ 44.098828/ -19.453394/ 44.096718/ -19.447379/
Tai Wei/ 44.150548/ -19.501387/ 44.153366/ -19.492835/
Guang Han Gong/ 44.119612/ -19.512327/


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Phil Stooke
post Oct 27 2015, 03:02 AM
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Yutu survives for yet another month...

-------------------------------------------

UHF Satcom ‏@uhf_satcom Oct 25
YUTU Lunar Rover currently transmitting on 8462.0278MHz - not a bad signal, easy copy in the speaker. FFT to follow shortly.

UHF Satcom ‏@uhf_satcom Oct 25
FFT of Yutu Lunar Rover's downlink signal on X-Band. LO=8GHz, IF=4xx MHz.


UHF Satcom ‏@uhf_satcom 7 hours ago*
YUTU Lunar rover on air again tonite, no sidebands visible, just carrier. A good signal none the less.

-------------------------------------------

* Oct 26th

Phil


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tolis
post Oct 27 2015, 08:29 AM
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Amazing. I can only imagine where the rover would be by now had it remained mobile.

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Phil Stooke
post Nov 24 2015, 01:27 AM
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Via Twitter, another good day on the Moon:

UHF Satcom ‏@uhf_satcom 5 hours ago *
YUTU Lunar Rover on air at present downlinking on 8462.0274MHz - receiving on the @sdrsharp AirSpy tonite. Good Sig!

* 23 November 2015


Phil


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Explorer1
post Nov 24 2015, 01:58 AM
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More impressive with every passing month! biggrin.gif

Though I am wondering if there's a chance of getting good radio tracking science by virtue of the long immobility on the surface, like they wanted to do for Spirit when it got stuck? Or are the Moon's physical properties already so well known from the retroreflectors left behind (and other missions) that it would be redundant?
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Phil Stooke
post Nov 24 2015, 12:05 PM
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You are right, tracking would not help much for the Moon. Also, because of the Moon's synchronous rotation (even taking libration into account) there is far less to measure than in the case of Mars. The laser reflectors are much more useful for this kind of thing.

Phil



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Phil Stooke
post Dec 19 2015, 06:44 AM
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The sun will rise at Sinus Iridum in a day or so, and if Chang'E 3 and Yutu wake up they will have survived for two whole years on the surface, longer than anything except the ALSEPs.

Phil


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Phil Stooke
post Dec 24 2015, 11:41 PM
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And Yutu did wake up (the lander too, presumably). So two years survival on the surface of the Moon. It would be nice to hear more about whether the lander and rover are still able to take pictures etc.

Phil


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Phil Stooke
post Jan 14 2016, 12:30 AM
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Looking back at Yutu...

When Yutu was near the big rock (Loong Rock or Outer Fence) it made a panoramic mosaic of the rocky crater Zi Wei just to its west. There are several hills in the distance. Here is a very exaggerated view of them:

Attached Image



Taking their directions into account, I think we are seeing the rims of these two craters indicated here:

Attached Image


Phil


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