IonStorm

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About IonStorm

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  1. IonStorm

    NASA's OSIRIS-REx

    Ryugu has not been observed to be active, though images at the specific camera angles that made them apparent for OSIRIS-REx (for improving navigation accuracy) have not (yet) been taken by Hayabus2. However, the hydration bands in the infrared are much weaker in Ryugu than Bennu and the magnetite features are absent in Ryugu. This points to a Bennu being wetter, which might be the mechanism for ejecting particles while at perihelion.
  2. IonStorm

    NASA's OSIRIS-REx

    Remember this is a composite. The particles are too dim to see without hugely overexposing Bennu.
  3. IonStorm

    NASA's OSIRIS-REx

    We don’t know yet, but we’re working on it.
  4. IonStorm

    NASA's OSIRIS-REx

    We have a campaign this summer, but the particles are small 1 to <30cm Our earlier plume campaign was negative, so the gas (if that’s the mechanism) isn’t abundant. But we’ll try. It is exciting for return
  5. IonStorm

    NASA's OSIRIS-REx

    Here’s some news in this thread.
  6. IonStorm

    NASA's OSIRIS-REx

    Various Surface Textures of Bennu’s Boulders The boulders on Bennu’s surface sport a variety of surface textures, from smooth, to hummocky, striated, and crumbly “cauliflower” in nature. The large boulder in the image center is ~92 ft (~28 m) across and has a somewhat round shape, though many smaller boulders surrounding it are very angular. Some of these appear to be fragments that may have disaggregated from the central boulder and display layering effects that may reflect some of the properties of their mineral composition. Other boulders show signs of surface exfoliation and fractures that may have been caused by impacts, mechanical weathering, and other forms of rock breakdown active on Bennu’s surface. This image was obtained by the MapCam camera on NASA’s OSIRIS-REx spacecraft on February 27 from a distance of 0.8 miles (1.3 km) and shows a region of the asteroid’s southern hemisphere near its south pole. Date Taken: Feb. 27, 2019 Instrument Used: OCAMS (MapCam) Credit: NASA/Goddard/University of Arizona https://www.asteroidmission.org/20190227t002051s742_map_iofl2pan/
  7. IonStorm

    NASA's OSIRIS-REx

    There will be more exciting information at a press conference next week. https://www.nasa.gov/press-release/nasa-to-host-media-teleconference-on-asteroid-sample-return-mission
  8. IonStorm

    NASA's OSIRIS-REx

    More images https://www.asteroidmission.org/2019-02-25-regolith-image-compilation-3/ A Region of Bennu’s Northern Hemisphere Close Up This trio of images acquired by NASA’s OSIRIS-REx spacecraft shows a wide shot and two close-ups of a region in asteroid Bennu’s northern hemisphere. The wide-angle image (left), obtained by the spacecraft’s MapCam camera, shows a 590-foot (180-meter) wide area with many rocks, including some large boulders, and a “pond” of regolith that is mostly devoid of large rocks. The two closer images, obtained by the high-resolution PolyCam camera, show details of areas in the MapCam image, specifically a 50-foot (15 meter) boulder (top) and the regolith pond (bottom). The PolyCam frames are 101 feet (31 meters) across and the boulder depicted is approximately the same size as a humpback whale. The images were taken on February 25 while the spacecraft was in orbit around Bennu, approximately 1.1 miles (1.8 km) from the asteroid’s surface. The observation plan for this day provided for one MapCam and two PolyCam images every 10 minutes, allowing for this combination of context and detail of Bennu’s surface. Date Taken: Feb. 25, 2019 Instrument Used: OCAMS (MapCam and PolyCam) Credit: NASA/Goddard/University of Arizona
  9. I'm not versed in InSight (beyond it and OSIRIS-REx sharing a highbay for a while) and what I read on public outlets. However, I expect similar rigor and review progress to have been performed by the engineers and the standing review board (as a Discovery class instead of New Frontiers class mission, there is a different risk tolerance).
  10. An astute observation. He (e.g. https://www.asteroidmission.org/team/team-list/?search=Metzger) and others were brought in to the mission during development in 2013*. They did extensive modeling and testing (e.g. https://dslauretta.com/2014/02/05/riding-the-vomit-comet/) to be sure that the backscatter of regolith from TAG and thrusters in a Bennu environment would not damage the spacecraft (especially guidance, navigation, and control) based on our backaway speed and geometry (this is one of the reasons our solar arrays gimbal into a Y during TAG). We have assumed that OSIRIS-REx instruments could become covered in dust, and thus are not required after sampling. But the Hayabsa2 images suggest that their optics are intact. *This is an example of why it takes so long to design a spacecraft to visit a novel environment.
  11. Possibly more so. The debris looks to be cause by their back-away thrusters. OSIRIS-REx will also have the pneumatic sampling event. There is a meeting between Hayabusa2 and OSIRIS-REx members next month to ask questions. As you can imagine, we are very interested in the details of the burn.
  12. IonStorm

    NASA's OSIRIS-REx

    Those are two different things. First, the particles observed by NavCam 1 are being studied with great intensity both for scientific discovery and to ensure spacecraft safety. Second, we have done analysis to ensure spacecraft safety when particles are liberated during collection as well as contingency plans if interfering debris is observed prior to stowage by SamCam and StowCam. We will also be watching our JAXA colleagues for lessons when they collect their sample from Ryugu 2/22/19 06:45-09:15 Japan time (2/21/19 16:45-19:15 Eastern) http://fanfun.jaxa.jp/jaxatv/detail/14034.html
  13. IonStorm

    NASA's OSIRIS-REx

    More on Detailed Survey: https://www.asteroidmission.org/wp-content/uploads/2018/06/SPP-Baseball-Diamond-Poster.pdf and 2:06-2:55 of:
  14. IonStorm

    NASA's OSIRIS-REx

    Nearly all (OTES is on the way) data from the cruise and Earth gravity assist has been released to the Planetary Data System. https://pds.nasa.gov/datasearch/subscription-service/SS-20190214.shtml To view the image files you need a FITS viewer, such as the free DS9 http://ds9.si.edu/. The best images have been released already, but if you like messing with raw data, here is your chance. If you didn't know, all NASA planetary missions publically release their data to PDS. Bennu data will be in future releases.
  15. IonStorm

    NASA's OSIRIS-REx

    Sometimes the anticipated, but low probability events happens. This will make for some interesting science. https://www.nasa.gov/feature/goddard/2019/osiris-rex-mission-status-update