New Horizons: Pre-launch, launch and main cruise, Pluto and the Kuiper belt |
New Horizons: Pre-launch, launch and main cruise, Pluto and the Kuiper belt |
Guest_BruceMoomaw_* |
Feb 28 2005, 06:28 AM
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#46
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Guests |
By "much better spectra", of course I mean in spectral resolution -- obviously they'll be pretty much whole-disk spectra, unlike Galileo's; but their spectral resolution will be so much better that they have a good chnce of revealing new surface constituents.
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Feb 28 2005, 07:36 AM
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#47
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
The LORRI imager's resolution on Io, depending on where it is in its orbit will be between roughly 12 and 15 km per pixel at closest approach.
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Feb 28 2005, 02:36 PM
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#48
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
That should be good to look for changes at smaller scales than can be seen from earth since I32
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Feb 28 2005, 05:11 PM
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#49
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Member Group: Members Posts: 270 Joined: 29-December 04 From: NLA0: Member No.: 133 |
QUOTE (BruceMoomaw @ Feb 28 2005, 06:25 AM) I attended the 2003 DPS meeting -- and, specifically, the special session on science goals for NH's Jupiter flyby. The impression I got is that the most interesting aspect of that flyby will be, not its imaging of the moons, but its near-IR spectra of them -- which will be much better than those from either Galileo or Cassini (better instrument than the former; much closer than the latter), and may well provide us with very interesting new data on their surface compositions. How about the resolution it will get on Jupiter ? Will it beat this splendid mosaic made by Cassini: http://photojournal.jpl.nasa.gov/jpeg/PIA04866.jpg -------------------- PDP, VAX and Alpha fanatic ; HP-Compaq is the Satan! ; Let us pray daily while facing Maynard! ; Life starts at 150 km/h ;
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Guest_BruceMoomaw_* |
Mar 1 2005, 06:22 AM
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#50
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Guests |
Oh, yes -- although, since NH's bit rate will be far lower than Cassini's, it won't make nearly as MANY mosaics of Jupiter.
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Mar 1 2005, 07:39 AM
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#51
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Member Group: Members Posts: 133 Joined: 29-January 05 Member No.: 161 |
QUOTE (BruceMoomaw @ Mar 1 2005, 06:22 AM) Oh, yes -- although, since NH's bit rate will be far lower than Cassini's, it won't make nearly as MANY mosaics of Jupiter. What will be the maximum data transmission rate at Jupiter? 315 days to first launch opportunity -------------------- |
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Mar 1 2005, 10:49 AM
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#52
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
New Horizons does have much more storage capacity than Cassini. So it could perhaps store a lot of stuff onboard for more boring parts of the cruise.
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Mar 1 2005, 12:11 PM
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#53
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
New Horizons will be able to transmit at 37 Kbps from Jupter, and a little over 1 Kbps from Pluto. The s/c has redundent 64 Gbit solid state recorders.
As to Jupiter imaging resolution, color images made near closest approach (C/A) will be of a resolution comparable to the Cassini image posted above. Panchromatic images will be about 3X better. However in both cases the imagers are very senstivie, having been designed for optimal perfomance at 32 AU. As such, there is likely to be overexposure in regions away from the terminator near C/A. |
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Mar 1 2005, 12:45 PM
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#54
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
You mentioned a distant Centaur flyby. Assuming the launch date doesn't change, what do you mean by distant? 1 million km? 50 million km?
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Mar 1 2005, 12:52 PM
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#55
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
Ted,
2002 GO will be 2.7 AU awa-- good OpNav practice and a chance to get a solid phase curve. We will search along the path for better (closer) candidates after launch, but Monte Carlo sims tell us not to expect anything close enough to generate real maps unless we get incredibly lucky. |
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Mar 1 2005, 03:20 PM
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#56
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Junior Member Group: Members Posts: 81 Joined: 25-February 05 From: New Jersey Member No.: 177 |
Has any thought been given to what Kupier Belt objects might be encountered after launch? How close might those flybys be? Or does that also depend on the launch date?
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"Too low they build, who build beneath the stars." - Edward Young |
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Mar 1 2005, 10:07 PM
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#57
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
A lot of work has gone into KBO flyby planning. NH1 can probably only get
to 1 or maybe 2 KBOs, and those will be small, i.e., Eros-sized or a bit smaller. This is because after we leave Pluto-Charon, we can only maneuver 100 m/s or so off this course, which means turning only ~0.1 deg. (NH2 can hit a large KBO because we can target it from Jupiter or Uranus as the "substitute" first target for Pluto.) We will not choose the first NH1 target KBO until about 2012, because we will have much better knowledge of KBOs by then in general, and the possible targets along our trajectory in particular. -Alan |
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Mar 1 2005, 11:29 PM
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#58
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Now leave the man alone so he can go and finish it before Jan '06
Doug |
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Mar 1 2005, 11:44 PM
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#59
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Member Group: Members Posts: 529 Joined: 19-February 05 Member No.: 173 |
Doug- Thanks, I do have a day job-- in fact, three of them by last count. Maybe I should assign someone to do Q&A with this site. The questions are good ones.
-Alan |
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Mar 2 2005, 12:52 AM
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#60
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I think I speak for everyone here in saying that we greatly appreciate your taking the time to answer our questions.
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