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Dawn Cruise
siravan
post Jan 7 2011, 11:03 PM
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I have found it interesting that a consequence of using ion propulsion is that Dawn is already pretty close to Vesta (just 0.06 AU) and slowly approaching it. A quick back-of-envelop calculation shows that the apparent magnitude of Vesta as seen from Dawn is already -0.5, which rivals Canopus. If it wasn't for the fact that Dawn is going to get close to Vesta in few months, it would have been possible to do some good science from even this distance.
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MarkG
post Jan 10 2011, 03:55 PM
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Dawn thoughts...
It is one Martian year since the Martian fly-by and orbit boost.
Dawn would need to be within about 2 million kilometers of Vesta for Vesta to appear bigger that a point to a human eye observer at that distance. It is about 3 times that distance now.
Question: What will be Dawn's velocity relative to Vesta when it enters Vesta's Hill sphere? (An approximation will do...a bit too complex to figure out myself on just one cup of coffee...)
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punkboi
post Jan 30 2011, 02:45 AM
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The Dawn website has been re-designed. Pretty cool.

http://dawn.jpl.nasa.gov/


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ElkGroveDan
post Jan 30 2011, 05:19 AM
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QUOTE (punkboi @ Jan 29 2011, 06:45 PM) *
The Dawn website has been re-designed.

Very nice. Looks like they put a CERES amount of time into that new design. I wonder if they also had to inVESTA lot of money.


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eoincampbell
post Jan 30 2011, 06:31 AM
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I didn't get it at first...then it dawned on me smile.gif


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punkboi
post Jan 30 2011, 07:11 AM
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All right folks... Let's leave it to Marc Rayman to make such witty/corny wordplay in his Dawn journals tongue.gif


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climber
post Jan 30 2011, 09:31 AM
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You'll never stop elkgroveDAWN biggrin.gif


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lyford
post Jan 30 2011, 03:59 PM
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Yes, we will have to keep our ION him. rolleyes.gif


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centsworth_II
post Jan 30 2011, 04:50 PM
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Attached Image
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nprev
post Jan 30 2011, 05:48 PM
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<goes to UMSF>
<reads this thread>
<groans>
<begins drinking early today>...


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Greg Hullender
post Jan 30 2011, 05:57 PM
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I think this is caused because the new layout has accidentally made the Dawn Journal inaccessible. The law of conservation of asteroid puns is causing the excess to spill over.

I sent an e-mail asking them to investagate--I mean LOOK AT it.

--Greg (It may already be too late) :-)
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tasp
post Jan 30 2011, 06:51 PM
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I am enjoying the levity here today.

(translation: drat, all the good puns are already used)




The slow approach vector from the ion drive is allowing too much time for everyone to belt out GRaND puns.

BTW, does high solar activity have any effect on the gamma ray and neutron detector on the craft? Either making it work better with more flux, or does it hinder it because of the increased background noise? Or do the two effects cancel ?
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punkboi
post Feb 3 2011, 06:52 AM
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New Dawn Journal is up

http://dawn.jpl.nasa.gov/mission/journal_01_30_11.asp


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antoniseb
post Feb 16 2011, 06:43 AM
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Dawn is about 5 million kilometers away now. How close will it have to be before its highest magnification cameras will be able to get the best ever images (so far) of Vesta? I don't know much about the imaging systems on this craft.
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ups
post Feb 16 2011, 04:32 PM
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Can we please keep the discussion sirius in this forum?
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