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Ultima Thule (2014 MU69)
http://forum.celestialmatters.org/viewtopic.php?f=2&t=954
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Author:  John Van Vliet [ Tue, 01-01-19, 3:53 GMT ]
Post subject:  Ultima Thule (2014 MU69)

a concept render based on the failsafe1 16 to 24 pixel image
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ut1.png
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Attachment:
Ultima_Failsafe1.jpg
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Author:  t00fri [ Tue, 01-01-19, 8:58 GMT ]
Post subject:  Re: ultma thule

Very well & Happy New Year!

Fridger

Author:  t00fri [ Tue, 01-01-19, 18:09 GMT ]
Post subject:  Re: ultma thule

New Horizons survived its flyby of Ultima Thule

Just followed NASA Live where first download info and ONE image was given of UT.

Shape: "Bowling Pin", ~ 35 x 15 km. Tomorrow they expect more material to come in.

Attachment:
ultima_thule_01.01.2019.png
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A composite of two images taken by New Horizons' high-resolution Long-Range Reconnaissance Imager (LORRI), which provides the best indication of Ultima Thule's size and shape so far.

Artist Img:
Attachment:
UT_artist.png
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The strange shape is compatible with either a contact binary (two bodies that are touching) or a close binary system

Color etc
Quote:
The lighting environment at its surface is very dim, as it receives only about 0.05% of the light from the Sun that Earth does. We do know that Ultima Thule has a reddish color, probably caused by exposure of hydrocarbons to sunlight over billions of years. The flyby will also reveal whether it has any moons, or even a ring system.

From http://pluto.jhuapl.edu/Ultima/Ultima-Thule.php

Cheers,
Fridger

Author:  Guckytos [ Tue, 01-01-19, 18:14 GMT ]
Post subject:  Re: ultma thule

It's going to be interesting what the shape really is like. Can't wait for more photos.

Hm, I am wondering, what is the most prominent form of these things out there in the deep?

* contact binary
* close binary system
* "more or less" spherical
* something else

--> We need more data! --> We need more spacecraft!

And Happy New Year to all.

Guckytos

Author:  John Van Vliet [ Wed, 02-01-19, 4:53 GMT ]
Post subject:  Re: ultma thule

looking like it is a "peanut" , that will be fun to model and apply images to it

Author:  t00fri [ Wed, 02-01-19, 18:59 GMT ]
Post subject:  Re: ultma thule

Itokawa looks not too different..!?

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itokawa.jpg
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Cheers,
Fridger

Author:  LukeCEL [ Wed, 02-01-19, 20:46 GMT ]
Post subject:  Re: ultma thule

We've gotten our first color images of 2014 MU69!

Attachment:
MU69_image_v1 copy.png
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(Credit: NASA/JHUAPL/SwRI)
I did notice how well-defined the two bodies of 2014 MU69 are. There are other contact binaries like 67P, but this one looks like you simply took two rocks and stuck them together...

Author:  t00fri [ Wed, 02-01-19, 21:00 GMT ]
Post subject:  Re: ultma thule

This is cool !! Many thanks for sharing the new info here (along with credits/links !)

The color is more or less a pink type one which might not be too dissimilar from the pink of 2018 VG18. And there is a known mechanism as well (analogous to Titan colors, for example ): Hydrocarbons exposed to Sunlight after a billion years or so end up pinkish ;-)

Cheers,
Fridger

PS: This would be JohnVV's 2018 VG18 appearance with borrowed color from Ultima Thule (right)... Upon scaling the color ratios down (by a common factor) for less brightness, the result is pretty much like what John and I played with a few days ago. Click on the image for a better view...
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Screenshot_20190102_220850.png
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Author:  t00fri [ Thu, 03-01-19, 14:46 GMT ]
Post subject:  Re: ultma thule

Here is a perhaps more realistic illumination scenario: 2018VG18 using the same color ratios as Ultima Thule above (assuming a similar reddening process of hydrocarbons on the surfaces). The 3 specular color ratios have been divided by a constant factor of 5. This is the result for 2018VG18:

Attachment:
Screenshot_20190103_153719.png
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Cheers,
Fridger

Author:  John Van Vliet [ Sat, 12-01-19, 17:03 GMT ]
Post subject:  Re: Ultima Thule (2014 MU69)

a short paper on this

Quote:
Overview of initial results from the reconnaissance flyby of a Kuiper Belt planetesimal: 2014 MU69


https://arxiv.org/abs/1901.02578

the rotational period is now known as 15 +- 1 hours

Author:  t00fri [ Sat, 12-01-19, 20:01 GMT ]
Post subject:  Re: Ultima Thule (2014 MU69)

Quote:
Overview of initial results from the reconnaissance flyby of a Kuiper Belt planetesimal: 2014 MU69


Excellent, John...many thanks! That's the kind of early info that celestia.Sci likes ;-)

Cheers,
Fridger

Author:  LukeCEL [ Sat, 26-01-19, 23:02 GMT ]
Post subject:  Re: Ultima Thule (2014 MU69)

We have a new, higher-resolution photo here: http://pluto.jhuapl.edu/Galleries/Featu ... age_id=586

Author:  t00fri [ Sun, 27-01-19, 8:34 GMT ]
Post subject:  Re: Ultima Thule (2014 MU69)

LukeCEL wrote:
We have a new, higher-resolution photo here: http://pluto.jhuapl.edu/Galleries/Featu ... age_id=586


Many thanks for letting us know! This complex shape looks like a challenge for JohnVV, who is a master with blender...

Cheers
Fridger

Author:  Guckytos [ Sun, 27-01-19, 17:21 GMT ]
Post subject:  Re: Ultima Thule (2014 MU69)

LukeCEL wrote:
We have a new, higher-resolution photo here: http://pluto.jhuapl.edu/Galleries/Featu ... age_id=586


Great,

did you notice that it looks like a kind of statuette, if you rotate it 90 degrees to the right? :DD

I know that it is just the play of light an shadow and our mind that is trained to see everywhere patterns. But still. I see 2 eyes, 2 noseholes and a partly open mouth. Okay, the eyes would be anatomically impossible for a human in that configuration ... :mrgreen:

Man, when will we be able to go out there in person and not having to wait years for a probe to get there? *sigh* born 20 years too early ...

Best regards,

Christian

Author:  John Van Vliet [ Mon, 28-01-19, 4:33 GMT ]
Post subject:  Re: Ultima Thule (2014 MU69)

i am waiting for a few images of that last higher res image
That way my "shape from Motion " software( MeshLab and MVE ) can get me a basic shape

hopefully next Friday the jpg's will be released , then i can "fudge" the camera exif data and get a low res shape file

see the release schedule
http://pluto.jhuapl.edu/soc/UltimaThule-Encounter/

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