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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Jul 22 2009, 09:19 AM
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#3
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
... A permanent "Jupiter-cam" set of observatories might be a worthwhile investment.... Amateurs already do that. You have almost 100% daily global coverage of Jupiter. Quality does vary, but on average it's very good. At least good enough to catch the present collision. Also, please check the JUPOS project (http://jupos.privat.t-online.de/index.htm) for nice nice Jupiter feature position studies. Of course, some funding might get more scientific results out of all that data. -------------------- _______________________
www.astrosurf.com/nunes |
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Jul 22 2009, 02:21 PM
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#4
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Amateurs already do that. You have almost 100% daily global coverage of Jupiter. Quality does vary, but on average it's very good. At least good enough to catch the present collision. Also, please check the JUPOS project (http://jupos.privat.t-online.de/index.htm) for nice nice Jupiter feature position studies. Of course, some funding might get more scientific results out of all that data. Very cool! I didn't know about that!! (And I don't know if anyone in our local astronomy club is aware of it either (yet)). Thanks muchly!! -Mike -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Jul 22 2009, 03:03 PM
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#5
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
Regarding lesser known amateur planetary observation projects, ALPO has some long lasting programs.
I've participated with some Mercury images some years ago and at that time there were enough good images to monitor some permanent surface albedo features on the planet's unimaged side. Also, there's some work related to monitoring seasonal changes in Uranus. As for Venus, although there are frequent UV images, I'm not aware of any particular aspect being studied, just general cloud monitoring. -------------------- _______________________
www.astrosurf.com/nunes |
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