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(Popular Science)   Asteroid decides to get jiggy, puts a ring on it   (popsci.com ) divider line
    More: Cool, asteroids, physical changes, Asteroid Belt, eclipses  
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1477 clicks; posted to Geek » on 27 Mar 2014 at 10:15 AM (2 years ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



6 Comments     (+0 »)
 
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2014-03-27 10:54:34 AM  
I wonder what gravitational strength an asteroid with a 90 mile diameter would have? Seems stunning that an asteroid would have rings that haven't been torn away by now.
 
2014-03-27 11:07:39 AM  
Well, if you are fit and are wearing a light space suit, it's just about possible to jump off a water/rock asteroid of about 10 km in diameter with about a 3.5 m/s escape velocity at the right vector, so you can work it out from there for a 90 mile water-rock asteroid...much would depend on density.
 
2014-03-27 12:05:42 PM  
Oh yay, another artist rendition!!!

Other than that, it is very interesting to see how such a small body mass can do this.
 
2014-03-27 06:15:47 PM  

Chalji: I wonder what gravitational strength an asteroid with a 90 mile diameter would have? Seems stunning that an asteroid would have rings that haven't been torn away by now.


I'm purely a total amateur for this but doesn't that depend on how much iron ore is present or material needed to present a stable magnetic field?
 
2014-03-27 06:33:19 PM  
Bad Astronomy write-up is better (bonus, no "artist's rendering")
 
2014-03-27 06:34:18 PM  

100 Watt Walrus: Bad Astronomy write-up is better (bonus, no "artist's rendering")


Oops. I was looking at it in Reader mode, which showed only the chart and schematic. Same artist rendering at the top. Bad Walrus.
 
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