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CE-2 flyby of Toutatis
Paolo
post Aug 25 2012, 04:27 PM
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I thought it was time to split the subject from the Moon forum.
Admins, can you move the relevant messages here?

anyway, just out: an interesting blog article by Bill Gray explaining how he recovered the probe and how he computed the orbit yielding the 13 December flyby date
Chang'e 2: The Full Story


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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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yaohua2000
post Dec 14 2012, 11:27 PM
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Video: http://news.cntv.cn/china/20121215/100850.shtml

Relative speed at 10.73 km/s
Closest flyby at 3.2 km altitude

Sequence (local time):
• Dec13 15:25 Return solar panels to 180 degrees
• Dec13 15:30 Switch to inertial attitude control
• Dec13 15:45 Switch to star orientation 10
• Dec13 15:48 Switch to star orientation 2
• Dec13 16:20 Solar panel monitoring camera power up
• Dec13 16:30 Closest flyby
• Dec13 16:45 Solar panel monitoring camera power down

Attached image: captured at 93–240 km distance between 16:30:09–16:30:24, maximum resolution 10 meters/pixel
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- Paolo   CE-2 flyby of Toutatis   Aug 25 2012, 04:27 PM
- - Paolo   a few more observations of Chang'e 2 (designat...   Aug 27 2012, 10:02 AM
- - TheAnt   Interesting story thank you for sharing. Mr Gray ...   Sep 1 2012, 10:03 PM
|- - rlorenz   I don't suppose they'll rename the spacecr...   Sep 1 2012, 10:19 PM
- - Paolo   I have got a copy of this paper presented at last ...   Oct 7 2012, 08:37 AM
- - tolis   According to JPL's HORIZONS ephemeris service,...   Oct 10 2012, 01:45 PM
- - Paolo   I saw it in November 1996 using a small, 114 mm te...   Oct 10 2012, 03:15 PM
|- - tolis   QUOTE (Paolo @ Oct 10 2012, 04:15 PM) I s...   Oct 12 2012, 10:22 AM
- - Paolo   today on arXiv: Composition of Near-Earth Asteroid...   Oct 11 2012, 07:00 AM
- - Paolo   to answer Phil Stooke's question in another th...   Oct 28 2012, 08:43 AM
- - Phil Stooke   Excellent - thanks for this. Phil   Oct 28 2012, 01:38 PM
- - Tom Tamlyn   The link to Bill Gray's August 25 planetary.or...   Oct 28 2012, 03:49 PM
- - Paolo   just tweeted by @asrivkin at the AGU meeting QUOT...   Dec 5 2012, 06:29 PM
- - Phil Stooke   Check out this e-poster from the current AGU meeti...   Dec 5 2012, 07:10 PM
- - Paolo   I saw it. It's a pity that 2 pics will not be ...   Dec 5 2012, 07:20 PM
- - Phil Stooke   No, but radar does that very well. Phil   Dec 5 2012, 07:51 PM
- - Paolo   speaking of which, the first radar image of the 20...   Dec 5 2012, 08:04 PM
- - Paolo   from this post to the mpml asteroids and comets gr...   Dec 6 2012, 08:15 AM
- - machi   So we can expect images with resolution ~100 m/pix...   Dec 6 2012, 10:58 AM
- - Explorer1   So the images will be the equivalent of what Deep ...   Dec 6 2012, 11:19 PM
- - machi   Deep Space took images of Braille with resolution ...   Dec 7 2012, 12:43 PM
- - Paolo   anyway, as the camera has two linear CCDs, a forwa...   Dec 7 2012, 01:17 PM
- - Phil Stooke   Machi, that is Steins, not Braille. And Paolo - d...   Dec 7 2012, 02:11 PM
|- - Paolo   QUOTE (Phil Stooke @ Dec 7 2012, 03:11 PM...   Dec 7 2012, 07:56 PM
- - machi   QUOTE (Phil Stooke @ Dec 7 2012, 03:11 PM...   Dec 7 2012, 03:11 PM
- - Paolo   third radar picture http://echo.jpl.nasa.gov/aster...   Dec 8 2012, 08:46 AM
- - machi   According to this page, flyby distance will be aro...   Dec 9 2012, 10:59 AM
- - tasp   I'm not thinking of any other 'rocks' ...   Dec 9 2012, 01:21 PM
- - Paolo   Itokawa had been imaged by radar before Hayabusa a...   Dec 9 2012, 01:23 PM
- - machi   QUOTE (tasp @ Dec 9 2012, 02:21 PM) I...   Dec 9 2012, 02:34 PM
- - Phil Stooke   Comparing the Itokawa radar images and shape model...   Dec 9 2012, 02:53 PM
- - JimOberg   Technical info is great. Hsieh hsieh. Big pictur...   Dec 9 2012, 05:47 PM
- - Explorer1   The absence of news is business as usual over ther...   Dec 9 2012, 08:38 PM
|- - JimOberg   QUOTE (Explorer1 @ Dec 9 2012, 09:38 PM) ...   Dec 10 2012, 06:14 AM
- - Explorer1   Yes, I've read Don Mitchell's page on the ...   Dec 10 2012, 06:32 AM
- - Paolo   there was a long article on the development of CE-...   Dec 10 2012, 08:15 AM
|- - JimOberg   QUOTE (Paolo @ Dec 10 2012, 09:15 AM) the...   Dec 10 2012, 03:13 PM
- - Paolo   another long article in Chinese linked today on th...   Dec 10 2012, 06:01 PM
|- - JimOberg   QUOTE (Paolo @ Dec 10 2012, 07:01 PM) ano...   Dec 10 2012, 08:01 PM
|- - stevesliva   ^ Google Translate ... seems to be a blogger askin...   Dec 10 2012, 08:13 PM
- - elakdawalla   Google translate worked for me. There's no new...   Dec 10 2012, 08:13 PM
|- - JimOberg   QUOTE (elakdawalla @ Dec 10 2012, 09:13 P...   Dec 10 2012, 09:17 PM
|- - mcaplinger   QUOTE (JimOberg @ Dec 10 2012, 02:17 PM) ...   Dec 10 2012, 09:51 PM
- - Phil Stooke   http://echo.jpl.nasa.gov/asteroids/Toutati...2_pla...   Dec 11 2012, 02:59 PM
- - machi   Very interesting images. Here is image pair from 9...   Dec 11 2012, 05:06 PM
- - Phil Stooke   15 years ago I made a map of Toutatis, using an ex...   Dec 11 2012, 06:04 PM
- - Paolo   anybody knows whether ESA is providing tracking su...   Dec 13 2012, 01:07 PM
- - Greenish   The images at http://echo.jpl.nasa.gov/asteroids/T...   Dec 13 2012, 03:00 PM
- - Phil Stooke   I don't see anything in the online chinese pre...   Dec 14 2012, 03:57 PM
- - Paolo   I have seen a release (in Chinese) on the site of ...   Dec 14 2012, 04:14 PM
- - machi   I read on multiple Chinese pages, that they planne...   Dec 14 2012, 04:43 PM
- - Paolo   be sure to check this! http://www.youtube.com/...   Dec 14 2012, 05:46 PM
- - Phil Stooke   The radar video is great - first time I have seen ...   Dec 14 2012, 06:51 PM
- - machi   The video is great, but Toutatis looks somewhat di...   Dec 14 2012, 07:53 PM
- - Phil Stooke   That's because of the bizarre geometry of rada...   Dec 14 2012, 08:05 PM
|- - tedstryk   Assuming it is better than the 2002 NY40 images, t...   Dec 14 2012, 09:04 PM
- - yaohua2000   Video: http://news.cntv.cn/china/20121215/100850.s...   Dec 14 2012, 11:27 PM
- - Cosmic Penguin   Just in from the Chinese news TV reports an hour a...   Dec 14 2012, 11:30 PM
|- - tedstryk   Woah! That is better than I was expecting. W...   Dec 14 2012, 11:35 PM
- - machi   Fantastic and great news! Now we have another...   Dec 14 2012, 11:56 PM
- - Explorer1   Very fast release! I'm glad to have been w...   Dec 15 2012, 12:06 AM
- - elakdawalla   I wonder, were these images taken with the webcam-...   Dec 15 2012, 12:09 AM
|- - Paolo   QUOTE (elakdawalla @ Dec 15 2012, 01:09 A...   Dec 15 2012, 08:32 AM
- - Phil Stooke   3.2 km? Amazing, just amazing. Solar panel monit...   Dec 15 2012, 12:18 AM
|- - mcaplinger   QUOTE (Phil Stooke @ Dec 14 2012, 05:18 P...   Dec 15 2012, 12:28 AM
|- - JimOberg   QUOTE (mcaplinger @ Dec 15 2012, 01:28 AM...   Dec 17 2012, 01:57 PM
- - elakdawalla   I'm trying to figure out what the scale of the...   Dec 15 2012, 12:38 AM
- - machi   My measurements are: long axis ~800 pix, short axi...   Dec 15 2012, 12:59 AM
- - Phil Stooke   I can confirm that this view shows the long dimens...   Dec 15 2012, 01:06 AM
- - Phil Stooke   Bringing out a bit more detail in the brighter are...   Dec 15 2012, 01:26 AM
- - machi   Attempted comparison with Goldstone radar imagery.   Dec 15 2012, 01:46 AM
- - ElkGroveDan   Is there any doubt that we are looking at two dist...   Dec 15 2012, 02:37 AM
- - Phil Stooke   If this is an approach sequence, there may be a de...   Dec 15 2012, 02:47 AM
|- - Stefan   QUOTE (Phil Stooke @ Dec 15 2012, 03:47 A...   Dec 15 2012, 11:58 AM
- - elakdawalla   Beginning to look at the image and try some early ...   Dec 15 2012, 02:58 AM
- - yaohua2000   More info: 20 Kbps at 7 million km, 90% data has b...   Dec 15 2012, 03:01 AM
|- - tedstryk   Thanks for posting that! I think you mean 5 m...   Dec 15 2012, 03:07 AM
- - Phil Stooke   Shape model and slope map here: http://echo.jpl.n...   Dec 15 2012, 04:30 AM
- - Paolo   wow! China releases the first pics and I happe...   Dec 15 2012, 07:37 AM
- - Doc   Outstanding Chinese performance. Thanks for postin...   Dec 15 2012, 09:08 AM
- - Tayfun Íner   Here is a 3D PDF of the shape model. (It is heavil...   Dec 15 2012, 09:30 AM
- - machi   Here is Chinese TV show dedicated to Toutatis flyb...   Dec 15 2012, 11:14 AM
- - Drkskywxlt   Congrats to the Chinese! There's some dep...   Dec 15 2012, 11:58 AM
- - machi   Yes, all images are almost equal (apart from size)...   Dec 15 2012, 12:41 PM
- - tolis   Amazing stuff! Apart from the sheer speed of ...   Dec 15 2012, 02:07 PM
- - Paolo   this is what a Chang'e 2 CMOS webcam looks lik...   Dec 15 2012, 02:12 PM
- - Phil Stooke   Comparison of the new image with the radar shape f...   Dec 15 2012, 02:31 PM
- - Paolo   Chinese sources such as this http://www.stdaily.co...   Dec 16 2012, 09:53 AM
|- - Cosmic Penguin   Apparently the main camera was not powered on (nor...   Dec 16 2012, 11:30 AM
- - machi   I have somewhat different informations about Chang...   Dec 16 2012, 10:15 AM
- - Paolo   I don't want to belittle the CE-2 achievement,...   Dec 16 2012, 12:01 PM
|- - mcaplinger   QUOTE (Paolo @ Dec 16 2012, 05:01 AM) wha...   Dec 16 2012, 04:29 PM
||- - dilo   I tried to make a stereogram using the fourth and ...   Dec 16 2012, 10:15 PM
|- - JimOberg   QUOTE (Paolo @ Dec 16 2012, 01:01 PM) as ...   Dec 17 2012, 02:05 PM
- - machi   We can look to the past. CE-2 flyby was in many wa...   Dec 16 2012, 12:36 PM
|- - tedstryk   It may also provide a bridge between what we are s...   Dec 16 2012, 01:22 PM
- - Phil Stooke   "beside basic shape and topography, what can ...   Dec 16 2012, 03:24 PM
|- - Paolo   QUOTE (Phil Stooke @ Dec 16 2012, 04:24 P...   Dec 17 2012, 09:39 AM
- - tasp   Appreciate the stereogram effort very much. I thi...   Dec 17 2012, 04:40 AM
- - JimOberg   On a policy issue note, we must realize that China...   Dec 17 2012, 02:09 PM
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