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Dawn Cruise
Stephen
post Oct 5 2007, 01:49 AM
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QUOTE (djellison @ Oct 4 2007, 08:54 PM) *
Yeah - that pretty much sums it up. Subforums get made when they're required - not becaue of some line in the sand or event that takes place. They're made because one topic dominates another forum.

Glad to hear there's a defensible logic behind such things. As opposed to ad hoc rules of a more arbitrary kind. smile.gif

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belleraphon1
post Oct 9 2007, 11:56 PM
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Sweetness and LIGHT.....

First ion thruster test......

http://www.planetary.org/blog/article/00001186/

Craig
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Marz
post Oct 10 2007, 04:32 AM
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Marc cracks me up!!!

"The drama was captured in the stirring name of the file that was transmitted to the spacecraft: dz002e.scmf"

Truly excellent and enjoyable reading, and great news everything's checking out ship-shape. I hope he can continue keeping me entertained in the 7.4 years to Ceres... are we there yet?
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peter59
post Oct 20 2007, 07:40 AM
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Science Instruments Checked Out
October 15 - 19
Dawn's science instruments were powered on and given their first health checks this week. The gamma ray and neutron spectrometer, imaging camera, and visible and infrared mapping spectrometer all operated perfectly.


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peter59
post Oct 27 2007, 06:36 AM
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Second Ion Thruster Checkout Completed Successfully
October 22 - 26
The mission operations team completed the checkout of a second ion thruster this week. In one of the tests, the thruster was operated for 27 hours continuously at 5 different throttle levels, and in two other tests it was operated at maximum power for 4 hours each time. All spacecraft systems performed extremely well.


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nprev
post Oct 27 2007, 01:32 PM
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Thanks for the update, Peter. Green bird, baby, green bird...GO DAWN!!! smile.gif

Slightly OT here, but has anyone else noticed that, provided that VEX, Chang'e and/or Kaguya survive, we should have active missions happening on or around all the major bodies of the inner Solar System in 2011? If the hangtime for them all extends to Dawn's arrival at Ceres, then that envelope gets pushed out to the Belt. What a heady time for UMSF!

EDIT: Forgot about Juno going to Jupiter...if everything converges right, then we've got it covered all the way out to Saturn at that time!!!


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brellis
post Oct 27 2007, 02:06 PM
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QUOTE (nprev @ Oct 27 2007, 06:32 AM) *
has anyone else noticed that, provided that VEX, Chang'e and/or Kaguya survive, we should have active missions happening on or around all the major bodies of the inner Solar System in 2011? If the hangtime for them all extends to Dawn's arrival at Ceres, then that envelope gets pushed out to the Belt. What a heady time for UMSF!

EDIT: Forgot about Juno going to Jupiter...if everything converges right, then we've got it covered all the way out to Saturn at that time!!!


New Horizons and the Voyagers will still be humming too smile.gif
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punkboi
post Oct 27 2007, 06:45 PM
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New journal up:

http://dawn.jpl.nasa.gov/mission/journal_10_24_07.asp


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peter59
post Nov 20 2007, 08:59 PM
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More Ion Thrusting Tests Completed
November 12 - 16
The week-long systems test of interplanetary cruise thrusting completed successfully on Monday. The third ion thruster was tested this week, and like the other two, it performed perfectly. The thruster operated at 4 throttle levels, including full power. In a separate activity, the mission operations team powered off the reaction wheels to test pointing control with hydrazine thrusters during ion thrusting.


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punkboi
post Nov 20 2007, 09:04 PM
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A week late, but whatever:

http://dawn.jpl.nasa.gov/mission/journal_11_13_07.asp

Still no "Where is Dawn now?" page on the official website, eh? wink.gif


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peter59
post Nov 24 2007, 07:35 AM
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Main Antenna Checked Out and New Software Uploaded
November 19-23
This week the spacecraft was commanded to use its main antenna for the first time and measurements showed that it is in fine condition. New software was installed in one of Dawn's computers (and its backup), correcting a minor bug that was discovered shortly after launch.


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punkboi
post Nov 29 2007, 06:48 PM
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"Where is Dawn now?" page finally up:

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


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peter59
post Dec 19 2007, 09:56 PM
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"Dawn has started IPS cruise thrusting to Vesta. The thrust came on at
4:08 PM pacific. We are on our way."—Project Manager, Keyur Patel 12/17/07


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punkboi
post Dec 20 2007, 09:15 AM
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http://www.planetary.org/blog/article/00001266/

New Dawn Journal up... Planetary.org posted calibration photos taken by the spacecraft's Framing Camera


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IM4
post Jan 8 2008, 09:33 PM
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Good news everyone!
Extended version of the Dawn trajectory is now available at HORIZONS (two additional segments till April 2008). I did some simulations and found that Dawn will pass within 0.048 AU from comet 79P/du Toit-Hartley somewhere around March 17, 2008. Exact date and distance depends on actual thrusting, nevertheless, upcoming event will be the closest of this kind till EPOXI encounter with comet Hartley-2.
Comet 79P was rediscovered last November in its 5th apparition and will pass perihelion in May 2008. That's a faint comet, but I hope not a smallest one. Even with coma/tail size of 20-30 thousands km Framing Camera and VIR spectrometer will be able to distinguish some details. I think that's a good opportunity to test and calibrate instruments on the real object, especially for VIR, which is a relative of Rosetta's VIRTIS spectrometer.

PS Attached image features comet orbit, Dawn trajectrory and planets positions on March 17, 2008.
Attached thumbnail(s)
Attached Image
 
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