Unmanned landing sites from LRO, Surveyors, Lunas, Lunakhods and impact craters from hardware impacts |
Unmanned landing sites from LRO, Surveyors, Lunas, Lunakhods and impact craters from hardware impacts |
Sep 7 2009, 07:51 PM
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
I figured it was time to begin a thread like this, especially since some of us may still be looking for the Surveyor III retro motor casing (assuming the bright dot to the north of the landing site isn't it).
We ought to be seeing some of the other Surveyors fairly soon, I would think. We know most of their locations pretty accurately. Again, I think there is a lot to be gained, both from scientific and engineering standpoints, from detailed imaging of the Surveyor VII landing site, just to mention one. And I really want to see how visible the Lunakhod tracks are as opposed to the MET and LRV tracks. So... until we begin to see images of other unmanned hardware (or the craters caused by same), we could always discuss comparisons of Surveyor III surface imagery to the new LROC images of its landing site here. I'm especially taken by how you can resolve many of the blocks in Block Crater in the LROC image, which gives you a good feel for the explosive nature of the ejecta and roughly where in the ejecta plume a given block might have come from. Might be interesting/useful to apply this information to the samples taken at that location. -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Jul 29 2021, 04:18 AM
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
I think if an object hits the surface at 22 km/h it would be damaged but it would still remain largely intact and would show up in the images as a single object. It would be similar to a large rock in appearance. it would probably not look like this, a crater with rays. To me this looks like a natural crater formed by a high speed impact. If it was the Luna 9 braking rocket stage the lander would be close to it and the pattern of craters visible around the lander in the panorama should be visible as well.
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 PDF: 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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Jul 29 2021, 08:29 AM
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Junior Member Group: Members Posts: 38 Joined: 7-October 20 Member No.: 8895 |
I think if an object hits the surface at 22 km/h it would be damaged but it would still remain largely intact and would show up in the images as a single object. It would be similar to a large rock in appearance. it would probably not look like this, a crater with rays. To me this looks like a natural crater formed by a high speed impact. If it was the Luna 9 braking rocket stage the lander would be close to it and the pattern of craters visible around the lander in the panorama should be visible as well. Phil Not sure my 22 km/hr estimate was right because from here - https://nssdc.gsfc.nasa.gov/nmc/spacecraft/...d=1966-006A.The article says that capsule impacted at 22 km/hr and didn't mention anything about the rocket stage. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/...on?id=1965-044A - Luna8 one..
Whether it would be possible to have the velocity reduced from 9300 km/hr to 22km/hr under 50 seconds by 45000N Engine from 75km altitude to 250m? I am not sure about the exact details but there might be more to it as the details when the probe was ejected are still a mystery..Luna8 page on NASA says a boom was released from the bottom of the spacecraft to check the altitude but the pnot sure whether Luna9 capsule was ejected when the spacecraft was hovering? and after ejection it seems the 4 Vernier engines were cut off which might have resulted in spacecraft crashing on to the surface. The only way to verify this is to look for an impact similar to this near Luna13.. (Wish we had more details) Location : https://quickmap.lroc.asu.edu/query?extent=...AyAbwF8BdC0yioA (Lat: 7.37233 Lon: 295.26334) - The small crater is about 4~5m in size..This might be even Luna8 if this is Luna9 rocket stage impact then Luna9 might be lying to North west of the impact point and the area also has depression from West to East.. |
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