[HN Gopher] Seismology of rubble-pile asteroids in binary systems
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Seismology of rubble-pile asteroids in binary systems
Author : raattgift
Score : 25 points
Date : 2024-03-01 13:41 UTC (9 hours ago)
(HTM) web link (academic.oup.com)
(TXT) w3m dump (academic.oup.com)
| raattgift wrote:
| Quoting the paper: "3.1 Tidal deformation as a source of ground
| motion How consequential are tides for binary asteroid
| seismology? ... Although the masses of a binary asteroid system
| are small compared to those of Earth and the Moon, the typical
| separation of binary asteroids is so small that the tidal
| accelerations only differ by an order of magnitude from those of
| the Earth-Moon system"
|
| This paper was shared around by the Royal Astronomical Society
| yesterday and today while by coincidence solid (Earth) tides were
| raised in another HN discussion about measuring the shape of the
| earth <https://news.ycombinator.com/item?id=39527639>.
|
| Quoting myself from there (although 101955 Bennu is not a binary
| asteroid): "Personally I like the idea of depositing a crash test
| dummy loaded with sensors onto the surface of (probable) rubble-
| pile 101955 Bennu. Is it like a ball pit, or like a bean-bag
| chair? Does the dummy sink or get buried in landslides or
| fountains of material? (We already know we can send things there
| (and return them): <https://www.nasa.gov/news-release/nasas-
| bennu-asteroid-sam>)."
|
| Rubble-pile binary asteroids 65803 Didymos & Dimorphos have nice
| wikipedia entries https://en.wikipedia.org/wiki/65803_Didymos and
| https://en.wikipedia.org/wiki/Dimorphos . Alas, so far we've only
| crashed things into the latter:
| https://science.nasa.gov/planetary-defense-dart/ (movies, images
| at https://dart.jhuapl.edu/Gallery/ ).
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