Jupiter Impact 2009 |
Jupiter Impact 2009 |
Jul 19 2009, 08:13 PM
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#1
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Very interesting observation of a dark mark on Jupiter... it's starting to ripple out across Twitter...
http://www.irishastronomy.org/cms/forum?fu...;id=79644#79647 More info: http://www.acquerra.com.au/astro/ObsReport...ter-impact.html -------------------- |
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Jul 21 2009, 11:43 PM
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#2
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Here's a paper putting the impact rate of 2 km comets at 4E-3 yr-1. (= one per 250 years average)
Zahnle et al. Icarus 163 (2003) 263-289. "Cratering rates in the outer Solar System." doi: 10.1016/S0019-1035(03)00048-4. Full article freely available here (684 kb) Either we've been really lucky and we've observed an extraordinary exciting period, or the impact rate needs to be adjusted upwards. (Makes you wonder how many we've missed??? A permanent "Jupiter-cam" set of observatories might be a worthwhile investment.) -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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