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'Something Weird Is Going On' as New Horizons Approaches Distant Asteroid (popularmechanics.com)

NASA's New Horizons spacecraft passed Pluto in 2015. But now it's getting strange readings while approaching its next destination, the Ultima Thule asteroid.

Popular Mechanics reports: Ultima Thule appears to not have a light curve, which is perplexing scientists... Asteroids like Ultima Thule reflect sunlight -- that's why they're bright spots instead of dark spots -- but the amount of light they reflect depends on how much of their surface is facing the Sun. The bigger their surface area, the brighter they become. Small asteroids like Ultima Thule aren't perfectly round, which means how much of their surface is facing the Sun changes as they rotate....

Ultima Thule isn't changing its brightness at all. New Horizons has been watching Ultima Thule for three months and hasn't spotted any brightness change, which is really odd. Ultima Thule is definitely not spherical -- astronomers determined that a year ago -- so why doesn't its brightness change?

One theory is that the New Horizon's probe is perfectly aligned with the asteroid's axis of rotation, so it's only seeing Ultima Thule's north (or south) pole. Another is that the asteroid is surrounded by dust clouds that "even out" its light curve. But that usually only happens when asteroids are near the sun and heating up, whereas Ultima Thule "is cold and dark and shouldn't have any dust...."

"Fortunately, we might not have to wait long for an answer to this problem. New Horizons will fly by Ultima Thule on January 1, and should give us high-resolution photos of the entire system," the article concludes. "With any luck, those photos will solve the mystery."

83 comments

  1. And Cue by maroberts · · Score: 2

    ,,,alien spaceship theories.

    --

    Donte Alistair Anderson Roberts - hi son!
    Karma: Chameleon

    1. Re:And Cue by Anonymous Coward · · Score: 0

      Look, I didn't want to say it was aliens, but..

    2. Re:And Cue by sheramil · · Score: 1

      "The Red Stuff", by John Wyndham.

    3. Re:And Cue by SqueakyMouse · · Score: 1

      They'll probably just probe Uranus and leave.

    4. Re:And Cue by Anonymous Coward · · Score: 0

      This is no cave

    5. Re:And Cue by pslytely+psycho · · Score: 5, Funny

      That's no moon...

      --
      Donald Trump, on a crusade to make Nixon look respectable
    6. Re:And Cue by Paul+Johnson · · Score: 4, Interesting

      "First, there was the problem of Rama's light curve. It didn't have one." From "Rendevous with Rama" by Arthur C. Clarke.

      --
      You are lost in a twisty maze of little standards, all different.
    7. Re: And Cue by Anonymous Coward · · Score: 0

      I guess people still blame David Brin for killing Kevin Costner.

    8. Re:And Cue by Anonymous Coward · · Score: 0

      Came here to quote that as well!

    9. Re:And Cue by jythie · · Score: 1

      Also cue the electric universe people with some explanation involving plasma.

    10. Re:And Cue by Anonymous Coward · · Score: 0

      SPACESHIP!!!

      Oh man, meeting aliens would be SO AWESOME! I've been hoping for such an event ever since I was a kid!

      Yeah, yeah, I know. It's probably just some boring old asteroid. Maybe it's surface got sun-blasted or something in its history, smoothing it out. Or whatever. I'm not a scientist, I don't really know what does or does not make sense in this domain. I'm getting my hopes up only to have them crushed once again. Such is my lot in life.

      Be that as it may, I would consider every suffering I have endured over the course of my life to be justified, however, if it turned out to be aliens.

    11. Re:And Cue by iggymanz · · Score: 1

      "And on far-off Earth, Dr. Carlisle Perera had as yet told no one how he had wakened from a restless sleep with the message from his subconscious still echoing in his brain: The Ramans do everything in threes."

    12. Re:And Cue by Anonymous Coward · · Score: 0

      I guess I'm not the only who thought of that book!

    13. Re:And Cue by nospam007 · · Score: 1

      ",,,alien spaceship theories."

      Wot? Then those aliens can just fly over the beautiful wall?

    14. Re:And Cue by Anonymous Coward · · Score: 0

      I'd say reality is just current perspective.
      There goes science.

    15. Re: And Cue by Anonymous Coward · · Score: 0

      I have no idea whose work this is but it's righteous and the law that you credit the author when quoting their work. Get with it buddy.

    16. Re: And Cue by Anonymous Coward · · Score: 0

      Clarke was hoping to get that sweet movie trilogy deal.

    17. Re:And Cue by rtb61 · · Score: 1

      Well if you are going to go Alien, I would suggest that a field suppressing Alien transmissions to allow distinctly human social evolution could be distorting other forms of radiation. Good luck finding them in the Oort cloud, especially if the Oort cloud itself is being used to block Alien transmissions from reaching this solar system. Kind of ruin the mud monkey evolutionary show if we could just tune into their signals and well copy their technology or societal adaptations, we would hardly be us any more or who we will become, perhaps Homo Via Lactia.

      --
      Chaos - everything, everywhere, everywhen
    18. Re:And Cue by Calydor · · Score: 1

      It's just the Mass Effect relay out past Pluto. Nothing to worry about, the chance of an eldritch horror from beyond the galactic rim to come bomb our planet is astronomically low.

      --
      -=This sig has nothing to do with my comment. Move along now=-
    19. Re:And Cue by Anonymous Coward · · Score: 0

      Hypotheses... Just sayin'.

    20. Re: And Cue by iggymanz · · Score: 1

      Morgan Freeman in 2000 said he wanted to produce it and be Cmdr. Norman, but says even after ten years no one has written a good script that matches the book.

  2. "Something weird is going on" is good for science by Anonymous Coward · · Score: 5, Insightful

    As the apocryphal quotation goes, "The most exciting phrase in science is not ‘Eureka!’ but ‘That’s funny ’."

  3. Not rotating ? by Alain+Williams · · Score: 3, Interesting

    But it is a bit far out to be gravitationally locked to the sun.

    It can't be covered by an ocean as it is not perfectly round, so there would be islands/continents that would have a different albedo. What would be liquid that far out (ie cold) ?

    1. Re:Not rotating ? by spiritplumber · · Score: 1

      It may be rotating very slowly, which sometimes happens.

      --
      Liberty - Security - Laziness - Pick any two.
    2. Re:Not rotating ? by Anonymous Coward · · Score: 0

      You are correct! Rotating slowly sometimes happen. I went a martial art course where creimer also attended. You should have seen how long it took him to rotate 360!

      See a picture he took at the course here:
      https://ibb.co/gVad65

    3. Re:Not rotating ? by Anonymous Coward · · Score: 0

      A flat surface, or flat surfaces, who's planar angle vs sun and us remains fairly constant, may not increase in brightness significantly if that angle already reflects most light away from us.

      I imagine when they get a closer look this object will have flat surface areas, many of which are fairly parallel with each other.

    4. Re:Not rotating ? by RockDoctor · · Score: 3, Interesting
      When a satellite and it's primary are gravitationally (tidally) locked, the locked component rotates at the same period as the rotation of the secondary around the primary. That's the situation we have between Earth and Moon - the Moon goes around the Earth every 29.x days (x varies on which version of "around" you want) and the Moon rotates on it's axis every 29.x days (same caveat). It is also possible for the primary to become tidally locked to the secondary, which is the situation between Pluto and Charon.

      What would be liquid that far out (ie cold)

      H2, He (miscible above 3.x K, IIRC), Ne. Nitrogen is close to it's triple point on Pluto, so it can slip in and out of fluidity.

      --
      Birds are not dinosaur descendants;birds are dinosaurs, for all useful meanings of "birds", "are" and "dinosaurs"
    5. Re:Not rotating ? by Anonymous Coward · · Score: 0

      I'd guess it's rotating fast enough that the exposure time is longer than the rotation period.

    6. Re:Not rotating ? by war4peace · · Score: 3, Interesting

      The moon isn't perfectly tidally locked to the Earth, see Lunar Libration.
      https://en.wikipedia.org/wiki/...

      Therefore it does have a light curve.

      --
      ...gis sdrawkcab (usually not responding to ACs; don't bother posting as AC)
    7. Re:Not rotating ? by war4peace · · Score: 1

      Forgot the direct link to the GIF: https://en.wikipedia.org/wiki/...

      --
      ...gis sdrawkcab (usually not responding to ACs; don't bother posting as AC)
    8. Re:Not rotating ? by ceoyoyo · · Score: 1

      It seems highly unlikely that anything out there is tidally locked to New Horizons.

      Being locked to the sun would suffice, but it's way too far away for that.

      Pluto and Charon are tidally locked to each other, but of course they both rotate relative to New Horizons.

    9. Re:Not rotating ? by Anonymous Coward · · Score: 0

      It's definitely rotating. Its light curve was measured by Hubble observations last year. Its non-round shape (or possibility of being a close binary system) was determined from stellar occultations essentially seeing the silhouette of the body or bodies against background stars. Most likely the spacecraft is approaching it from a pole. Incidentally, the Hubble-measured light curve was also quite subtle (considering the known uneven shape) so it's known that it has a pole oriented toward the inner Solar system.

    10. Re:Not rotating ? by Applehu+Akbar · · Score: 1

      My guess is that at this distance it’s going to be a featureless ballbearing of ice. If so, then whatever rotation it may have is moot.

    11. Re:Not rotating ? by Anonymous Coward · · Score: 0

      Or if it is rotating, maybe the object is mostly symmetrical and unvarying about its rotational axis.

    12. Re:Not rotating ? by Hognoxious · · Score: 1

      Even if it was locked to the sun, how likely is it that the probe always keeps directly between the sun & the asteroid? Or at least always keeps the same angle to it?

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    13. Re:Not rotating ? by Hognoxious · · Score: 1

      Its rotation period matches the orbit, so it is tidally locked. Libration is due to other factors, mainly the fact that the orbit isn't perfectly circular.

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    14. Re:Not rotating ? by war4peace · · Score: 1

      True, I wanted to prove it does have alight curve even if tidally locked.

      --
      ...gis sdrawkcab (usually not responding to ACs; don't bother posting as AC)
    15. Re:Not rotating ? by ceoyoyo · · Score: 1

      At the distance of New Horizons, if something was tidally locked to the sun it would rotate once per orbital period... once every couple centuries. So too slow for us to detect with a light curve.

  4. The most obvious? by ReneR · · Score: 1

    Aliens obviously! ;-)

  5. Check the camera by Anonymous Coward · · Score: 0

    Maybe the camera is broken and the computer has been sending back the same pixels for three months to cover it up.

    1. Re:Check the camera by Anonymous Coward · · Score: 1

      Or they left the lens cap on.

    2. Re:Check the camera by Hognoxious · · Score: 1

      It's not my turn. I went last time!

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    3. Re:Check the camera by Applehu+Akbar · · Score: 1

      Or they left the lens cap on.

      In that case, who exactly would have put the lens cap back on after Pluto?

  6. Re:"Something weird is going on" is good for scien by DCFusor · · Score: 4, Insightful

    And all real scientists live to hear, or better, speak just that phrase. It's the payoff for all that work.

    --
    Why guess when you can know? Measure!
  7. Zaphod stole another ship by Anonymous Coward · · Score: 0

    "‘It’s the wild colour scheme that freaks me out,’ said Zaphod, whose love affair with the ship had lasted almost three minutes into the flight. 'Every time you try and operate these weird black controls that are labeled in black on a black background, a little black light lights up in black to let you know you’ve done it.’" - Douglas Adams

    1. Re: Zaphod stole another ship by Anonymous Coward · · Score: 0

      Designed by Sony. My DVD player is exactly like that, and in a cabinet too.

  8. Sci-Fi books start this way by Anonymous Coward · · Score: 0

    All good sci-fi books start with someone looking at a graph and saying "that's odd." Then, when their colleagues look at, they say "that's really odd."

    1. Re: Sci-Fi books start this way by Anonymous Coward · · Score: 0

      And in movies it's the "you should take a look at this" trope.

  9. Re:"Something weird is going on" is good for scien by jythie · · Score: 3, Insightful

    Yeah.. any time I hear people complaining that scientists are dogmatic and hate anything new or novel, I wonder if they have ever actually met a scientist outside having their ideas debunked.

  10. That's funny. by Anonymous Coward · · Score: 0

    For this reason, God sends them a powerful delusion(operation of wandering)(planet) so that they will believe the lie?

    Mystery Red of the Great American Eclipse

    NASA Allais Effect Eclipse Experiment

  11. Too bad much of NASA is closed for the holidays by Anonymous Coward · · Score: 0

    Some live reports would be nice but someone's not getting his wall for Christmas so maybe we'll get to see the archived data later.

    1. Re:Too bad much of NASA is closed for the holidays by Tablizer · · Score: 1

      You solved it! The Thulians built a wall around their world to keep nosy probes out. After all, earth doesn't send their best.

  12. Re:Postulate V2: Matter is 1.7x10^23 hz and higher by 110010001000 · · Score: 1

    Are you one of those Electric Universe nutters? If so, please get a real education. Until then, please stop.

  13. Ask the flat earthers by rml1997 · · Score: 1

    They tend to be able to convince themselves out of most problematic observations

    1. Re: Ask the flat earthers by Anonymous Coward · · Score: 0

      This asteroid is merely just a sticker stuck on the farthest side of the spinning Earth disk.

  14. Re:"Something weird is going on" is good for scien by Tablizer · · Score: 1

    No, "something weird is going on" could mean your probe will be destroyed by a cloud of pebbles. This mystery has got to be making the route planners nervous.

    True, a cloud of pebbles would be an interesting find out this far, but it also means we won't know much more about it for at least another 20 years.

  15. The aliens built a wall around it, to keep us out. by Grog6 · · Score: 1

    It's a Steel Barrier , not an Iron Curtain.

    Really.

    --
    Truth isn't Truth - Guliani
  16. God continuously invents science by GillBates0 · · Score: 1

    God continuously invents science

    --
    An Indian-American Hindu committed to non-violent thought/speech/action alarmed by the global explosion of radical Islam
    1. Re: God continuously invents science by Anonymous Coward · · Score: 0

      That's funny...

    2. Re:God continuously invents science by Anonymous Coward · · Score: 0

      Man continuously invents gods.

  17. Spoon by Anonymous Coward · · Score: 0

    Spoon!

  18. Re: Postulate V2: Matter is 1.7x10^23 hz and highe by Anonymous Coward · · Score: 0

    You have to postulate the possibilities. - smug.

  19. End of good quality simulation? by seasunset · · Score: 1

    Maybe the virtual world where we live can only maintain a logically consistent simulation when the observer is "inside" the "solar system"?

    If something goes "physically out", then empirical and sensory experience is reduced in quality?

    Maybe the end game scenario is when we collectively conclude we are in a simulation? Maybe we are almost winning...

  20. Re:"Something weird is going on" is good for scien by Kjella · · Score: 1

    Well where I left experimental science in high school it was more like math, you either solved it right and got points or you did it wrong and at best got a partial score. At no point did "oh, that's funny" mean anything other than "oh my god, we'll have to do it again". Sometimes we just gave up finding the problem and invented the results we should have gotten instead. It's not until you hit the research stage that you go off the rails and start looking at questions where the answers aren't already preordained by a 100+ year old comprehensive theory with a mountain of proof. So if they don't know any actual scientists that might be their perception of it.

    The other main reason people say it is because they have some kind of warped perception of where the burden of proof should be. Like it's totally okay to believe in aura therapy or your chakra or yin-yang etc. even though it doesn't show up on any scanners known to man. Screw randomized trials, if you believe in God then prayer helps. Well except that you live or die as often as the Muslim in the next bed. There's so many nutters who want to define their own reality and don't like it when facts get in the way.

    --
    Live today, because you never know what tomorrow brings
  21. Its alien by Eravnrekaree · · Score: 1

    Simple, an alien spacecraft, like the Oumuomua

  22. Energeian Planes by Anonymous Coward · · Score: 0

    For this reason, God sends them a powerful delusion(operation of wandering)(planet) so that they will believe the lie.

    Mystery Red of the Great American Eclipse
    It has blood on it!
    NASA Allais Effect Experiment

  23. Because they refused the love of the truth by Anonymous Coward · · Score: 0

    God sends them a powerful delusion so that they will believe the lie.

    Mystery Red of the Great American Eclipse
    It has blood on it!
    NASA Allais Effect Eclipse Experiment

    1. Re:Because they refused the love of the truth by Anonymous Coward · · Score: 0

      So much for the "free will" we were promised, huh.

    2. Re:Because they refused the love of the truth by Anonymous Coward · · Score: 0

      You still have it. Just remember there is a reason the serpent wanted Eve to eat the forbidden fruit. It was not without consequence. Ongoing.

  24. Re:"Something weird is going on" is good for scien by burningcpu · · Score: 1

    My commonly used versions are:

    What the fucking fuck.

    Well, that's problematic.

    I usually cycle through the two until I figure it out.

  25. Space 1999 by Anonymous Coward · · Score: 0

    Am I the only person who thinks of Space 1999 whenever Ultima Thule is mentioned? See episode: Death's other Dominion

  26. Could it be that it doesn't rotate? by Anonymous Coward · · Score: 0

    I know nothing about astrophysics, so this might be very stupid, but who knows...

  27. If its not rotating by wolfheart111 · · Score: 1

    then it could be intelligent.

    --
    [($)]
  28. Possibly because its a binary pair? by Dereck1701 · · Score: 1

    We have information suggesting that it may be a binary contact pair, could it be tidally locked to the sun and thus have no light curve? Another possibility is that being out so far with so little gravitational interference maybe it is encased in a relatively uniform "snowdrift" of ice and dirt. Either way we should know in a week or so, hopefully it will be a heck of a show no matter what.

    1. Re:Possibly because its a binary pair? by robbak · · Score: 1

      No, it's too far away from the sun for it to have tidal effects that could lock it.Tidal effects come from the objects having a reasonable size compared to the distance between them - and the difference between it and the sun is huge.

      --
      Prediction for end of Universe #42: Fencepost error in Quantum_bogosort.cpp
  29. Obviously by meglon · · Score: 1

    an alien Starbucks.

    --
    Fascism: An authoritarian and nationalistic right-wing system of government and social organization. See also: NAZI's
  30. I Thought by Anonymous Coward · · Score: 1

    I thought that one of the attractions of visiting these far-away Kuiper Belt objects, was that they were "pristine", unaffected by collisions or the heat of the sun. And there is a general belief that such objects may have a lot of organic compounds in their makeup, with the result that they may be very dark and have little reflectivity.

    If the albedo is low enough, it may simply reflect too little light to detect a decent light curve. Regardless of it's shape, orientation or spin.

  31. Perplexed by Anonymous Coward · · Score: 0

    > Ultima Thule appears to not have a light curve, which is perplexing scientists...

    After the dinosaurs don't have feathers which lasted 200+ years as a science fact, I've more skeptical of proven to be true science facts.

    'Over the next X years' is/will become the same as 'Protecting the children' as a key to when to start disbelieving the speaker/paper/article/reporter/expert.

    Think of this the next time your co-worker trades in his 3 year old car for a new car while you drive a 10+ year old one.

  32. Re:Postulate V2: Matter is 1.7x10^23 hz and higher by Anonymous Coward · · Score: 0

    You're like the "all geology is local" dogmatists who ridiculed Wegener's continental drift theory for decades.