SLIM, Small Japanese lunar lander |
SLIM, Small Japanese lunar lander |
Jan 19 2024, 05:19 PM
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#46
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Conference underway. Thus far:
1. Landed successfully. 2. Power-negative; battery not charging (as Hungry noticed.) 3. At least one of the little rovers landed successfully as well. -------------------- 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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Jan 19 2024, 05:29 PM
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#47
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Member Group: Members Posts: 200 Joined: 20-November 05 From: Mare Desiderii Member No.: 563 |
Press release (Japanese). Machine translation:
QUOTE Results of the Small Lunar Demonstrator (SLIM) Moon Landing
The Japan Aerospace Exploration Agency (JAXA) confirmed that the Small Lunar Module (SLIM) landed on the Moon at 0:20 am on 20 January 2024 (Japan Standard Time). Communications have been established since landing. However, the solar cells are not generating power, and priority is currently being given to data acquisition from the Moon's surface. Detailed analysis of the acquired data will be carried out in the future. We will keep you updated on the future status of the project. |
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Jan 19 2024, 05:32 PM
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#48
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Senior Member Group: Members Posts: 2086 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Looks like the LEV 1 and LEV 2 are both working, they are getting images back now.....
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Jan 19 2024, 05:41 PM
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#49
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Member Group: Members Posts: 200 Joined: 20-November 05 From: Mare Desiderii Member No.: 563 |
From press conference, there is hope that even once the battery is depleted (in several hours), as the sun angle changes, the solar panels may start producing power and revive the lander. In the meantime they're prioritising getting data back over recovery operations.
(However, a couple of posts (1, 2) claim a heater has been turned off to conserve battery power -- I didn't catch this myself -- dunno what this means for the longevity of the lander.) |
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Jan 19 2024, 05:46 PM
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#50
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Senior Member Group: Members Posts: 1431 Joined: 26-July 08 Member No.: 4270 |
I heard the comment about the battery as well. They seemed to imply that its what would allow the battery to last for "several hours."
Someone finally asked a decent question. Is there no power being generated by the solar panels? Or just an inadequate amount to keep up with the battery discharge? Answer was that they don't yet know, pending data. -------------------- -- Hungry4info (Sirius_Alpha)
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Jan 19 2024, 05:55 PM
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#51
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Member Group: Members Posts: 123 Joined: 3-September 12 From: Almeria, SE Spain Member No.: 6632 |
If I combine this picture of the landing site (downslope towards WNW)
http://www.unmannedspaceflight.com/index.p...st&id=53653 with the PV cells orientation from the loanding telemetry (towards +X; +Y is downslope), then the PV cells should be facing north / slightly to the east (NNE). This would mean (at 13°S) that in fact the ilumination could improve a little bit in the coming days. (Just a very quick over-the-thumb analysis from my side, might be wrong) Thorsten |
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Jan 19 2024, 05:56 PM
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#52
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Member Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 |
Congratulations for a soft landing on the Moon.
Is restarting of the engines possible for SLIM? For an attempted hop or attitude change. -------------------- Antti Kuosmanen
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Jan 19 2024, 05:56 PM
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#53
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
One thing I noticed and don't understand is that the IMU (lower left corner) was showing normal lunar surface gravitational acceleration at landing but the bar changed color from green to yellow. Don't know what the color coding indicates, but given the attitude graphic does this imply that the lander is indeed upside down?
That would explain the array not charging, but if so why are they getting telemetry unless it has a very robust omni antenna? Or maybe there's one on the ventral surface for use during cruise. -------------------- 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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Jan 19 2024, 06:04 PM
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#54
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Senior Member Group: Members Posts: 1431 Joined: 26-July 08 Member No.: 4270 |
-------------------- -- Hungry4info (Sirius_Alpha)
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Jan 19 2024, 06:14 PM
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#55
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Senior Member Group: Members Posts: 1431 Joined: 26-July 08 Member No.: 4270 |
Loss of Signal.
- from Scott Tilley, - from AMSAT-DL. Not sure if this genuinely means mission LOS or if it just finished transmitting something. -------------------- -- Hungry4info (Sirius_Alpha)
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Jan 19 2024, 06:22 PM
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#56
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
One thing I noticed and don't understand is that the IMU (lower left corner) was showing normal lunar surface gravitational acceleration at landing but the bar changed color from green to yellow. Don't know what the color coding indicates, but given the attitude graphic does this imply that the lander is indeed upside down? Presumably the lower left is the vector sum of the three accel axes and doesn't say anything about orientation, and they only display the angular rates, not the absolute angles. But one imagines they wouldn't draw it upside down if it weren't in fact oriented that way. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jan 19 2024, 08:24 PM
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#57
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Member Group: Members Posts: 550 Joined: 1-May 06 From: Scotland (Ecosse, Escocia) Member No.: 759 |
NASA's Deep Space Network is currently showing no radio traffic with SLIM. There was steady download during the first few hours after the landing.
Live feed from DSN: Deep Space Network Tracking This is not in any way a negative indication of the state of the spacecraft - radio traffic can be expected to stop and start. |
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Jan 20 2024, 07:21 AM
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#58
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
I have added SLIM to my Moon map. It is here:
https://publish.uwo.ca/~pjstooke/moon-sites-map.jpg Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jan 20 2024, 10:03 AM
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#59
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Member Group: Members Posts: 123 Joined: 3-September 12 From: Almeria, SE Spain Member No.: 6632 |
Great map, Phil!
Is there also a version including only the landers and impactors (successful and unsuccessful), but not the upper stages and orbiters? ---- Excellent 12min Video analyzing the Slim landing from Scott Manley: https://www.youtube.com/watch?v=muK6gFtv7_o The solar panels might point westwards. This means that from in a week or so they might start generating power. Thorsten |
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Jan 22 2024, 07:11 AM
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#60
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Solar System Cartographer Group: Members Posts: 10166 Joined: 5-April 05 From: Canada Member No.: 227 |
Thanks, Thorsten. I don't have a different version of the map.
Here's a JAXA tweet with welcome news (but no images released yet) https://twitter.com/SLIM_JAXA/status/1749295017427108233 着陸後、電源OFFするまでの間に、着陸降下中や月面で取得した技術データや画像データの地上への送信を完了できました。現在、そのデータの詳細な解析を行っています。プロジェクトチームとしてはたくさんのデータが取得できたことを確認し、ほっとするとともにワクワクしはじめています。 #JAXA #SLIM Translated from Japanese by After landing, until the power was turned off, the technical data and image data acquired during the landing descent and on the lunar surface were successfully transmitted to the ground. We are currently conducting a detailed analysis of that data. As a project team, we are relieved and excited to see that we have been able to obtain a large amount of data. #JAXA #SLIM 8:56 PM · Jan 21, 2024 From published views of the lander it appears that the multispectral camera is facing sideways as intended, and if they were able to operate it, or are able to when the sun reaches the array, it should provide good data. Phil EDIT: https://twitter.com/SLIM_JAXA/status/1749320754628546849 We are preparing to announce the status of #SLIM and current results at the end of the week. Although the attitude after landing did not go as planned, we are glad we could achieved so much and are happy to have landed successfully. We’re also excited to analyse the data. #JAXA Another point... The multispectral camera is not a panoramic camera, it will take images covering an area about 50 by 70 degrees across. But perhaps the navigation cameras are also able to take images on the surface so a partial panorama might emerge. -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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