NH Arrokoth (formerly Ultima Thule) Encounter Observations & Results, post-flyby discussion as the data arrives |
NH Arrokoth (formerly Ultima Thule) Encounter Observations & Results, post-flyby discussion as the data arrives |
Guest_alex_k_* |
Mar 18 2019, 03:58 PM
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#121
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To the extent that the spectral responses of the two cameras are different, you could create a crude 2-false-colour image from those frames. You'd need to warp one frame to align them better, though. A great idea, Fredk! A rough attempt: [attachment=44439:lorri_mvic4.png] (update 2) |
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Mar 18 2019, 04:06 PM
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#122
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
I was in that session at LPSC - they are working on shape and stereo but more to do for a final shape model. Then the images can be merged effectively. Jeff Moore said they are not convinced the small pits are impact craters, and suggest some may be drainage depressions leading into sub-surface voids. Not sure I agree, but a size distribution plot would be a useful thing to help with that problem. Phil Curious, if there is void filling, would the "Brasil nut effect" being temperature dependent change things? There has been some suggestion that size sorting is temperature dependent,
Reverse Brazil Nut Problem A paper by Hong et al. in 2001 predicted the "reverse Brazil nut effect", in which under certain conditions, their numerical observation showed the opposite effect - large beads falling to the bottom of a container, and small beads rising to the top of the container. [4,5] A previous finding of theirs showed that a system of hard sphere condenses in the presence of gravity below a critical temperature Tc [6].P.V. Quinn and D.C. Hong, Phys. Rev. E 62, 8295 (2000). Rather interesting to consider the possibility of thermodynamics past Pluto driving "grain tectonics". Imagine if the Brazil-nut effect shakes warm KBOs into minimum surface spheres; while the reverse-Brasil-nut-effect shakes cool KBOs into maximum sufrace pancake? |
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Mar 18 2019, 04:18 PM
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#123
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
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Mar 18 2019, 05:31 PM
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#124
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
unmannedspaceflight.com was just mentioned at the press conference
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Mar 18 2019, 05:42 PM
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#125
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
unmannedspaceflight.com was just mentioned at the press conference Eh, names are fair when names are given... Time Counter -12:OO "This was posted to Unmanned Spaceflightdot com by citizen scientist Roman Tkachenko" http://www.unmannedspaceflight.com/index.p...st&p=244187 |
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Mar 18 2019, 09:25 PM
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#126
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Senior Member Group: Members Posts: 1584 Joined: 14-October 05 From: Vermont Member No.: 530 |
Press conference material is up on NH website
http://pluto.jhuapl.edu/News-Center/News-A...p?page=20190318 with slides here: http://pluto.jhuapl.edu/News-Center/Press-...page=2019-03-18 |
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Mar 19 2019, 02:32 AM
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#127
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
more reporting coming out, this from Science News
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Guest_alex_k_* |
Mar 19 2019, 05:40 PM
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#128
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Guests |
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May 16 2019, 07:22 PM
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#129
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
Initial results from the New Horizons exploration of 2014 MU69, a small Kuiper Belt object
https://science.sciencemag.org/content/364/6441/eaaw9771 |
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May 16 2019, 11:53 PM
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#130
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Outstanding.
In addition to name-checking the forum & highlighting Roman's work, an UMSF moderator is one of the coauthors of this paper. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Nov 14 2019, 03:48 AM
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#131
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Senior Member Group: Members Posts: 2088 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Though this issue is moot now, the article only says "following a significant backlash", so I don't think the final name and the New Horizons team nickname are really connected in any way. The headline writers are just looking for clicks by putting the two together.
I do wonder if the sports equipment transport company or the air base in Greenland ever got a complaint... |
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Nov 14 2019, 05:08 AM
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#132
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Member Group: Members Posts: 214 Joined: 30-December 05 Member No.: 628 |
If the new name is all right with Alan, it's certainly OK with me. I do wonder whether NASA will also be giving new names to the two individual lobes?
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Nov 14 2019, 06:34 AM
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#133
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
The IAU is the authority for all naming conventions, including classes of features. What might get interesting is what exactly the lobes would be classified as geologically, or if they'll come up with a new category for them.
This may have already happened with comets since 67P C-G, 103/P Hartley, and Borrely apparently consist of lobes as well, though the mechanism by which they arose may be different. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Nov 14 2019, 09:48 AM
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#134
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Member Group: Members Posts: 214 Joined: 30-December 05 Member No.: 628 |
More on the naming process that was followed in this instance
http://www.spacedaily.com/reports/NASA_ren...cklash_999.html IAU had the final say, but it seems the change was initiated by the NH team itself, then passed to NASA, who then consulted the Powhatan tribal elders. |
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Nov 14 2019, 03:28 PM
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#135
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Senior Member Group: Members Posts: 4250 Joined: 17-January 05 Member No.: 152 |
One problem with the name "Ultima" was that it was rather... ultimate. Even for NH, with luck Arrokoth won't be its farthest encounter and "Penultima" might've been more appropriate.
(PS - time to change the name of this thread?) |
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