Page 3 of 4 FirstFirst 1234 LastLast
Results 61 to 90 of 91

Thread: Kuiper Belt Extended Mission (KEM) (Ex New Horizons)

  1. #61
    Join Date
    Aug 2003
    Posts
    2,051
    Quote Originally Posted by Selfsim View Post
    Ze latest from New Horizons on frosty the snowman taken from 4,200miles (6,700kms), 135m/pixel .. this time, apparently complete with a face including eyes, nostrils and a mouth!:

    http://pluto.jhuapl.edu/News-Center/...?page=20190124
    When I first saw that picture for some reason I thought about Miranda, the inner most large moon of Uranus.

  2. #62
    Join Date
    Dec 2011
    Posts
    3,597
    Quote Originally Posted by Superluminal View Post
    When I first saw that picture for some reason I thought about Miranda, the inner most large moon of Uranus.
    Hmm .. maybe ..
    I reckon the big dent (where the eyes are) looks a lot like Phobos' big ding here(?)

  3. #63
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    5,797
    More on our favorite snowman.


    https://arxiv.org/abs/1902.00997

    Ultima Thule (486958; 2014 MU69): Necklace, Composition, Rotation, Formation

    J. I. Katz (Submitted on 4 Feb 2019)

    Flyby images of Ultima Thule (486958; 2014 MU69) show a comparatively bright ``necklace'' between its two lobes, in contrast to its generally low albedo. The necklace is found in the most shaded, and therefore coolest, part of its surface. It may be clean, high albedo, ``hoarfrost'' condensed from vapor evaporated from the low albedo dirty ice elsewhere. Ammonia, the likely major constituent of Ultima Thule, has the necessary vapor pressure. The rotation period of 15±1 h is at least twice its breakup period, indicating either that its formation was not limited by angular momentum or that half its angular momentum was lost after formation, perhaps to surrounding gas in the proto-Solar System. The lobes of Ultima Thule must have spherized under conditions different than those encountered by its present, post-contact, configuration.

    (Includes comparison with 1I/2017 U1 ‘Oumuamua.)
    Do good work. —Virgil Ivan "Gus" Grissom

  4. #64
    Join Date
    Aug 2003
    Posts
    2,051
    Now they're saying that Ultima-Thule, is actually a pancake, not a snowman.
    http://www.spaceweather.com/

  5. #65
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    5,797
    More on the "pancake" aspect of Ultima Thule, with drawings and photos. One of the lobes does look pretty flat, as measured by the blocking of starlight.

    https://phys.org/news/2019-02-horizo...ce-ultima.html

    New Horizons' evocative farewell glance at Ultima Thule
    February 9, 2019, NASA

    An evocative new image sequence from NASA's New Horizons spacecraft offers a departing view of the Kuiper Belt object (KBO) nicknamed Ultima Thule—the target of its New Year's 2019 flyby and the most distant world ever explored.

    These aren't the last Ultima Thule images New Horizons will send back to Earth—in fact, many more are to come—but they are the final views New Horizons captured of the KBO (officially named 2014 MU69) as it raced away at over 31,000 miles per hour (50,000 kilometers per hour) on Jan. 1. The images were taken nearly 10 minutes after New Horizons crossed its closest approach point.
    Do good work. —Virgil Ivan "Gus" Grissom

  6. #66
    Join Date
    Sep 2003
    Location
    The beautiful north coast (Ohio)
    Posts
    50,317
    Scott Manley has a nice video talking about why Ultima Thule may be the shape it is.
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  7. #67
    Join Date
    Aug 2005
    Location
    NEOTP Atlanta, GA
    Posts
    3,424
    Higher resolution images of Ultima Thule released by the New Horizons team:

    https://phys.org/news/2019-02-horizo...ws-ultima.html

    https://3c1703fe8d.site.internapcdn....whorizonss.jpg

    New Horizons spacecraft returns its sharpest views of Ultima Thule
    February 23, 2019, NASA

    The mission team called it a "stretch goal" – just before closest approach, precisely point the cameras on NASA's New Horizons spacecraft to snap the sharpest possible pics of the Kuiper Belt object nicknamed Ultima Thule, its New Year's flyby target and the farthest object ever explored.

    Now that New Horizons has sent those stored flyby images back to Earth, the team can enthusiastically confirm that its ambitious goal was met.

    These new images of Ultima Thule – obtained by the telephoto Long-Range Reconnaissance Imager (LORRI) just 6˝ minutes before New Horizons' closest approach to the object (officially named 2014 MU69) at 12:33 a.m. EST on Jan. 1 – offer a resolution of about 110 feet (33 meters) per pixel. Their combination of high spatial resolution and a favorable viewing angle gives the team an unprecedented opportunity to investigate the surface, as well as the origin and evolution, of Ultima Thule – thought to be the most primitive object ever encountered by a spacecraft.

    <snip>


    The higher resolution brings out a many surface features that weren't readily apparent in earlier images. Among them are several bright, enigmatic, roughly circular patches of terrain. In addition, many small, dark pits near the terminator (the boundary between the sunlit and dark sides of the body) are better resolved. "Whether these features are craters produced by impactors, sublimation pits, collapse pits, or something entirely different, is being debated in our science team," said John Spencer, deputy project scientist from SwRI.

    Read more at: https://phys.org/news/2019-02-horizo...ltima.html#jCp
    Last edited by schlaugh; 2019-Feb-23 at 04:16 PM.

  8. #68
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    "First results from New Horizons’ time in the Kuiper Belt"

    https://arstechnica.com/science/2019...e-kuiper-belt/

    For many at the Johns Hopkins Applied Physics Laboratory, January 1 this year didn't mean a New Year's celebration. Instead, it meant the first arrival of data from New Horizons' visit to a small Kuiper Belt object. But, like its earlier flyby of Pluto, the probe was instructed to grab all the data it could and deal with getting it back to Earth later. The full set of everything New Horizons captured won't be available for more than a year yet. But with 10 percent of the total cache in hand, researchers decided they had enough to do the first analysis of 2014 MU69.

    2014 MU69 is thought to preserve material as it condensed in the earliest days of the Solar System's formation. And everything in the New Horizons' data suggests that this is exactly what it has done. With the exception of one big crater temporarily named "Maryland" and the gentle collision that created its two-lobed structure, the object appears to have been largely untouched by more than 4 billion years of the Solar System's existence.
    I am because we are
    (African saying)

  9. #69
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    5,797
    More first results on Ultima Thule.

    https://science.sciencemag.org/conte.../6441/eaaw9771

    Initial results from the New Horizons exploration of 2014 MU69, a small Kuiper Belt object
    S. A. Stern, et al.
    Science 17 May 2019:
    Vol. 364, Issue 6441

    The Kuiper Belt is a broad, torus-shaped region in the outer Solar System beyond Neptune’s orbit. It contains primordial planetary building blocks and dwarf planets. NASA’s New Horizons spacecraft conducted a flyby of Pluto and its system of moons on 14 July 2015. New Horizons then continued farther into the Kuiper Belt, adjusting its trajectory to fly close to the small Kuiper Belt object (486958) 2014 MU69 (henceforth MU69; also informally known as Ultima Thule). Stellar occultation observations in 2017 showed that MU69 was ~25 to 35 km in diameter, and therefore smaller than the diameter of Pluto (2375 km) by a factor of ~100 and less massive than Pluto by a factor of ~106. MU69 is located about 1.6 billion kilometers farther from the Sun than Pluto was at the time of the New Horizons flyby. MU69’s orbit indicates that it is a “cold classical” Kuiper Belt object, thought to be the least dynamically evolved population in the Solar System. A major goal of flying past this target is to investigate accretion processes in the outer Solar System and how those processes led to the formation of the planets. Because no small Kuiper Belt object had previously been explored by spacecraft, we also sought to provide a close-up look at such a body’s geology and composition, and to search for satellites, rings, and evidence of present or past atmosphere. We report initial scientific results and interpretations from that flyby.
    Do good work. —Virgil Ivan "Gus" Grissom

  10. #70
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    "Snowman-shaped target of NASA’s New Horizons mission gets a brand-new name"

    https://www.theverge.com/2019/11/12/...-belt-arrokoth

    A snowman-shaped object that NASA probe New Horizons flew by in early 2019 now has a brand-new name. On November 12th, NASA officials announced that the item formerly known as MU69 — and once nicknamed Ultima Thule — would now have the name Arrokoth, which is the word for “sky” in the Powhatan / Algonquian language.
    I am because we are
    (African saying)

  11. #71
    Join Date
    Nov 2004
    Posts
    5,697
    Do we have any info on how the name was chosen?
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

    Stephen Colbert.

  12. #72
    Join Date
    Mar 2004
    Posts
    19,702
    Ah, I liked Ultima Thule as a name. Apparently, some thought it sounded too much like the Thule society, which is tied to the Nazis, so they renamed it. Thule society sounds like something I might have heard of, but if so, probably something I only heard of in passing.

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

    The Leif Ericson Cruiser

  13. #73
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    Quote Originally Posted by parallaxicality View Post
    Do we have any info on how the name was chosen?
    GreekWire gives the answer.

    https://www.geekwire.com/2019/ultima...-new-horizons/

    Members of the New Horizons science team announced today that their proposed name has won approval by the International Astronomical Union and its Minor Planet Center.

    Before making the proposal, the scientists won the consent of elders and representatives of the Powhatan Tribe — which is best-known as the home tribe for Pocahontas in the 17th century. Some present-day members of the tribe live in Maryland, which was the home base for New Horizons mission operations.

    “The name ‘Arrokoth’ reflects the inspiration of looking to the skies and wondering about the stars and worlds beyond our own,” New Horizons principal investigator Alan Stern, a planetary scientist at Southwest Research Institute, said in a NASA news release. “That desire to learn is at the heart of the New Horizons mission, and we’re honored to join with the Powhatan community and people of Maryland in this celebration of discovery.”

    Lori Glaze, director of NASA’s Planetary Science Division, praised the choice of the name and said “we graciously accept this gift from the Powhatan people.”
    I am because we are
    (African saying)

  14. #74
    Join Date
    Nov 2004
    Posts
    5,697
    Odd. I thought Classical KBOs had to be named for creation deities. Unless the sky is a creation deity in Powhatan beliefs.
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

    Stephen Colbert.

  15. #75
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    "The PI's Perspective: What a Year, What a Decade!"

    http://www.spacedaily.com/reports/Th...cade!_999.html

    New Horizons is healthy and performing well as it flies ever onward, at nearly one million miles per day! This month we're collecting new data on the Kuiper Belt's charged particle and dust environment, and observing two distant Kuiper Belt objects (KBOs) to learn about their surface properties, shapes and rotation periods, and to search for satellite systems.

    Much more is in store for this mission, but as this year and decade conclude, I want to look back and take stock of where we have been.

    For New Horizons, 2019 began with a major mission milestone: the first-ever close up and personal exploration of a KBO. That target, originally known as 2014 MU69, is now the farthest world ever explored - more than a billion miles beyond Pluto!

    And, if you hadn't heard, last month MU69 finally received its official name: Arrokoth, a Powhatan/Algonquian Native American word for "sky," which the New Horizons team chose. I love this beautiful name, and the way it beautifully honors both the state of Maryland, where so many Powhatans lived and where New Horizons was build and is operated from!
    I am because we are
    (African saying)

  16. #76
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    5,797
    Quote Originally Posted by Van Rijn View Post
    Ah, I liked Ultima Thule as a name.
    And what was wrong with the name Xena? [electronic tears flood the Internet] Okay, I'm over it. Thule's not a bad name, we've had a USAF base in Greenland with that name for years. I do like Arrokoth too, though.

  17. #77
    Join Date
    Jun 2015
    Location
    Houston
    Posts
    1,561
    Quote Originally Posted by roger e. Moore View Post
    and what was wrong with the name xena? [electronic tears flood the internet] okay, i'm over it. Thule's not a bad name, we've had have a usaf base in greenland with that name for years. I do like arrokoth too, though.
    ftfy.

  18. #78
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    5,797
    While the KEM continues, here is a short paper with lots of background on the Kuiper Belt and how it works. I liked it, hope you do too.

    https://arxiv.org/abs/1911.07897

    Resonant Kuiper Belt Objects -- a Review
    Renu Malhotra
    (Submitted on 18 Nov 2019)

    Our understanding of the history of the solar system has undergone a revolution in recent years, owing to new theoretical insights into the origin of Pluto and the discovery of the Kuiper belt and its rich dynamical structure. The emerging picture of dramatic orbital migration of the planets driven by interaction with the primordial Kuiper belt is thought to have produced the final solar system architecture that we live in today. This paper gives a brief summary of this new view of our solar system's history, and reviews the astronomical evidence in the resonant populations of the Kuiper belt.

  19. #79
    Join Date
    Jul 2012
    Posts
    385
    Quote Originally Posted by Roger E. Moore View Post
    While the KEM continues, here is a short paper with lots of background on the Kuiper Belt and how it works. I liked it, hope you do too.

    https://arxiv.org/abs/1911.07897

    Resonant Kuiper Belt Objects -- a Review
    Renu Malhotra
    (Submitted on 18 Nov 2019)

    Our understanding of the history of the solar system has undergone a revolution in recent years, owing to new theoretical insights into the origin of Pluto and the discovery of the Kuiper belt and its rich dynamical structure. The emerging picture of dramatic orbital migration of the planets driven by interaction with the primordial Kuiper belt is thought to have produced the final solar system architecture that we live in today. This paper gives a brief summary of this new view of our solar system's history, and reviews the astronomical evidence in the resonant populations of the Kuiper belt.
    Meh...I didn't read it all.

    But I wanna say I'm glad you're back from wherever. I look forward to parsing through the stuff you share.

    cheers,

  20. #80
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    5,797
    More on Arrokoth, the "snowman" of the Kuiper Belt.

    https://arxiv.org/abs/2002.06720

    Color, Composition, and Thermal Environment of Kuiper Belt Object (486958) Arrokoth
    W.M. Grundy, et al.
    (Submitted on 17 Feb 2020)

    The outer Solar System object (486958) Arrokoth (provisional designation 2014 MU69) has been largely undisturbed since its formation. We study its surface composition using data collected by the New Horizons spacecraft. Methanol ice is present along with organic material, which may have formed through radiation of simple molecules. Water ice was not detected. This composition indicates hydrogenation of carbon monoxide-rich ice and/ or energetic processing of methane condensed on water ice grains in the cold, outer edge of the early Solar System. There are only small regional variations in color and spectra across the surface, suggesting Arrokoth formed from a homogeneous or well-mixed reservoir of solids. Microwave thermal emission from the winter night side is consistent with a mean brightness temperature of 29 ± 5 K.
    Do good work. —Virgil Ivan "Gus" Grissom

  21. #81
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    New Horizons pushing the frontier ever deeper into the Kuiper Belt

    https://www.spacedaily.com/reports/N..._Belt_999.html

    New Horizons is healthy and performing perfectly as it flies deeper and deeper into the Kuiper Belt! Recently we conducted an engineering review of the spacecraft to "trend" how it was working compared to when it was launched. The result was amazing: Every system and science instrument aboard New Horizons is working as well as it did when we lifted off, more than 14 years and almost 5 billion miles ago. As mission principal investigator I could not be prouder - the men and women who designed, built and tested New Horizons literally created a masterpiece of American workmanship that will likely be able to perform and explore for many more years and many more miles!
    I am because we are
    (African saying)

  22. #82
    Join Date
    Sep 2003
    Location
    The beautiful north coast (Ohio)
    Posts
    50,317
    This got me wondering what New Horizons was up to.

    LINK
    The team expects It will take more than 20 months, through 2020, to return all the Arrokoth flyby data to Earth. But even while doing that, the spacecraft will observe more Kuiper Belt objects (KBOs) with its telescopic, onboard Long Range Reconnaissance Imager (LORRI). These images will be used to study the rotation rates and surface properties of these KBOs, and to search for satellite systems around them. New Horizons will also continue to use its space plasma and dust sensors to map the charged-particle radiation and dust environment in the Kuiper Belt, out to a distance 50 times as far from the Sun as the Earth is, just past the outer limits of Pluto's orbit. At the same time, New Horizons will map the interplanetary hydrogen gas, from the solar wind, that fills the Kuiper Belt. These studies will improve on what the legendary Voyager spacecraft could do when they traversed this region, because the sensors on New Horizons are much more advanced over 1970s-era Voyager technology.

    It is possible that another flyby target can be found and reached with New Horizons' remaining fuel supply. And after that? Another exciting possibility is that we can dramatically augment New Horizons' capabilities by uploading new observing and onboard data-reduction software once the spacecraft's flyby software is no longer needed. If NASA approves such a plan, New Horizons could survey the Kuiper Belt population in ways that no other mission or telescope on Earth or in Earth orbit can, and possibly even detect and hunt down its own next flyby target.

    Future New Horizons extended missions, if funded by NASA, could explore even farther out. The spacecraft is on an escape trajectory from the Sun, traveling about three astronomical units per year. (An astronomical unit, or AU, is the average distance from Earth to the Sun, about 93 million miles or 149 million kilometers.) Moreover, New Horizons and its payload sensors are healthy and operating perfectly. The spacecraft has enough power and fuel to operate into the mid-2030s or longer, perhaps enough to reach the boundary of interstellar space.
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  23. #83
    Join Date
    May 2003
    Posts
    6,191
    Quote Originally Posted by Swift View Post
    This got me wondering what New Horizons was up to.
    That is one impressive machine. I write software and occasionally build embedded hardware for a living, and I have to say that I'm really glad I don't have to write stuff that will keep working perfectly decades later and millions of miles away from anyone being able to repair it.
    Conserve energy. Commute with the Hamiltonian.

  24. #84
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    "The birth of a "Snowman" at the edge of the Solar System"

    https://www.spacedaily.com/reports/T...ystem_999.html

    A model developed at the Faculty of Physics at the Technion, in collaboration with German scientists at Tubingen, explains the unique properties of Arrokoth - the most distant object ever imaged in the solar system. The research team's results shed new light on the formation of Kuiper Belt objects, asteroid-like objects at the edge of the Solar system, and for understanding the early stages of the solar system's formation.

    The researchers' findings, published in the Nature, explain the unique characteristics of "the Snowman," known formally as Arrokoth, It is the farthest imaged object in the system, and pictures of it were first taken last year by the New-Horizons space mission.
    I am because we are
    (African saying)

  25. #85
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    "Five years after Pluto encounter, New Horizons probe does a far-out parallax experiment"

    https://www.geekwire.com/2020/five-y...ax-experiment/

    NASA’s New Horizons probe has measured the distance to nearby stars using a technique that’s as old as the ancient mariners, but from a vantage point those mariners could only dream of.

    The experiment, conducted on April 22-23 as the spacecraft zoomed 4.3 billion miles out from Earth, produced the farthest-out parallax observations ever made.

    “It’s fair to say that New Horizons is looking at an alien sky, unlike what we see from Earth,” principal investigator Alan Stern, a planetary scientist at the Southwest Research Institute, said today in a news release. “And that has allowed us to do something that had never been accomplished before — to see the nearest stars visibly displaced on the sky from the positions we see them on Earth.”
    I am because we are
    (African saying)

  26. #86
    Join Date
    Sep 2003
    Location
    The beautiful north coast (Ohio)
    Posts
    50,317
    Quote Originally Posted by selvaarchi View Post
    "Five years after Pluto encounter, New Horizons probe does a far-out parallax experiment"

    https://www.geekwire.com/2020/five-y...ax-experiment/
    That's very cool.
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  27. #87
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    "Five years after New Horizons flyby, scientists assess next mission to Pluto"

    https://spaceflightnow.com/2020/07/1...sion-to-pluto/

    Five years ago, NASA’s New Horizons spacecraft barreled by Pluto for a high-speed encounter that gave humanity its first fleeting close-up look at the distant world, finding glaciers and mountains of water ice. Scientists are now planning how to go back.

    New Horizons flew within 7,800 miles (12,550 kilometers) of Pluto on July 14, 2015, more than nine years after departing Earth on a speedy trajectory that made the spacecraft the fastest ever launched up to that time.

    The mission snapped numerous images, revealing unexpected geologic activity on Pluto, craggy mountain ranges made of hardened water ice, dune fields containing frozen methane, the largest glacier in the solar system.

    The New Horizons mission is the first to visit the the Kuiper Belt, a ring of small, icy worlds beyond the orbit of Neptune. After zooming past Pluto, the largest world in the Kuiper Belt, the plutonium-powered spacecraft journeyed farther from the sun and flew by a peanut-shaped object named Arrokoth on Jan. 1, 2019.
    I am because we are
    (African saying)

  28. #88
    Join Date
    Feb 2005
    Posts
    12,116
    Anything else in its path? Or is it all Voyager type stuff from now on?

  29. #89
    Join Date
    May 2003
    Posts
    6,191
    Quote Originally Posted by publiusr View Post
    Anything else in its path? Or is it all Voyager type stuff from now on?
    My understanding is that New Horizons can remain operational into the 2030's, and that there's the potential for another close flyby if a suitable target can be found close enough to the trajectory. But that at this point, we don't know of such a suitable target, and I don't think we can be certain of finding one.
    Conserve energy. Commute with the Hamiltonian.

  30. #90
    Join Date
    Jan 2014
    Location
    Klang, Malaysia
    Posts
    8,838
    Quote Originally Posted by publiusr View Post
    Anything else in its path? Or is it all Voyager type stuff from now on?
    Yes there is.

    https://www.spacedaily.com/reports/N...Pluto_999.html

    New Horizons is healthy and continuing to send data back from the flyby of the Kuiper Belt object (KBO) Arrokoth back in late 2018 and early 2019, even as it speeds deeper into the Kuiper Belt and farther from the Earth and the Sun.

    By next spring, New Horizons will be 50 times as far from the Sun as the Earth is - only the fifth operating spacecraft to reach that distance. But as far as we've come, there's much more ahead! We plan to upgrade the spacecraft system and instrument software aboard New Horizons to enhance the mission's scientific capabilities and to search for new KBO targets to study or even fly by. I'll describe both of those plans just below.
    I am because we are
    (African saying)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •