NAVCAM archive update

796 NAVCAM images were just added to the Archive Image Browser. They cover the period 26 August to 20 October 2015, which includes beautiful post-perihelion images, and the comet from afar during Rosetta’s far excursion.

ARCHIVERELEASE_JAN16

The latest images can be found in the folders labelled MTP020 and MTP021.

Comments

19 Comments

  • logan says:

    Should be noted that full library freshness has been upgraded from 6 to 3 months.

    Kudos and Kudos to H. NAVCAM and H. ESAC Teams 🙂

    • Haro says:

      Please give an update of Philea lander status !!
      The update video from two weeks ago has no sound added.
      So everybody is very curious to know how Philea is doing right now.
      Thank you.

  • ianw16 says:

    It’s hard to know where to post this, so I’ll stick it here.

    The 50 th ESLAB symposium is upcoming in March. The abstract book has been published (probably subject to change): http://www.congrexprojects.com/docs/default-source/16a04_docs/16a07_abstract-book_20160203.pdf?sfvrsn=2
    Some interesting posters from scanning through it:

    Properties of the Diamagnetic Cavity at Comet 67P/Churyumov-Gerasimenko
    Charlotte Goetz et al
    “However in July 2015, the signatures of a cavity were detected at distances of up to 330 kilometers. Up until November 2015 a total of 480 intervals when Rosetta was situated in the diamagnetic cavity have been detected.” Page 28.

    Infrared Detection of Exposed Water Ice on 67P/CG Surface
    Gianrico Filacchione et al.
    “After the identification of two water ice patches in the Imhotep region by means of VIRTIS-M, we report about the detection of further deposits observed in the Khepry and Anhur regions.” Page 50.

    The Plasma Interaction of Comet 67P/Churyumov-Gerasimenko With The Solar Wind
    Karl-Heinz Glassmeier et al.
    “Details of the pick-up process and subsequent acceleration of charged particles of cometary origin, the deflection of the solar wind, new wave generation processes, indications of bow shock dynamics, magnetic cavity formation, the impact of CMEs on the inner most coma and further cometary plasma processes could be studied……” Page 84-85.

    Evolution and Structure of a Comet Magnetosphere – Rosetta Observations
    Hans Nilsson et al.
    “In mid to late April the solar wind started to disappear from the observation region. This was associated with the solar wind deflection reaching 90°, indicating that the solar
    wind free region formed due to severe mass loading and associated solar wind deflection.” Page 87.

    And if you need something a bit relaxing and artistic after all that, then:
    Exploring 67P through Art
    Ekaterina Smirnova
    http://www.ekaterinasmirnova.com/eslab-proposal
    Page 92-93.

    • logan says:

      Thanks Ianw16 🙂 Seems it’s going to be a reassessment of Cometary Field. From Giotto upwards.

      “Thermophysical History of the Nucleus of the Comet 67P/CG” That’s a big title… Really interested in this one.

      “A Comparative Analysis of Opposition Effect on Comet 67P/Churyumov-Gerasimenko using Rosetta-OSIRIS Images”… This effect confounded Us to no avail. Part of the reasons OSIRIS shots are harder to digest…. “This suggests there is no coherent back scattering but only shadow hiding…”

      Maria Capria et al. are going to tell us about their explorations doing sort of the same we are doing… Observation and modeling.

      D. Constantinescu et al.: “…we give a lower bound estimate for the mean electrical conductivity of the Churiumov-Gerasimenko nucleus.”

      We already have an average permittivity of approximately 1.27 (Kofman et al.,2015). from our Little Philae. Herique Alain et al. exploring Mineralogical implications.

      “…At Philae’s final landing site, Abydos, DIM detected no dust impact…” But photo shots show at least one trace of dust ejecting. From Harald Krüger et al.

      “…we discuss mechanisms that could explain the radial distribution of particles (radius > ~1mm) observed within 20 km of the nucleus”. From Mark Hofstadter et al. JPL/Caltech. [You are going to need big computing].

      “…A nearly circular orbit around 6 AU, continuous activity
      outside of the water sublimation line, and frequent outbursts in activity make SW1 a useful observational target for a better understanding of distant cometary activity drivers”. We really need to send a drone there, Charles Schambeau et al. UCF/USA.

      Philippe Rousselot et al. from UTINAM/OSU-THETA/FR Talk about Big comets.

      More to come.

      • OzObserver says:

        Finally someone sees the light on a future mission to 29P/ Schwassmann-Wachmann 1, just hope that the decision makers are watching /listening!

    • logan says:

      “…Equally surprising has been the lack of rather small particles; to date no clear sign of particles smaller than about 500 nm has been detected”.

      “…Due to the 3D character of an atomic force microscope the determination of their shape is possible, revealing a non-spherical, irregular structure down to the smallest sizes…revealing the aggregate nature of irregular grains at the sub-micron scale…”

      Lattice imprinting, -if ever postulated- would be late phenomena.

      MIDAS touch transmuting paradigms. From Mark Bentley et al. and Roland Schmied et al. at SRI/Austria.

      • logan says:

        Hi Gerald 🙂 …Also giving support to idea that aggregation start a hot temperatures.

    • logan says:

      “…An intriguing possibility is that these
      particles may be left over relics of the formation
      process, as there are several lines of evidence
      (especially lack of thermal and aqueous
      alteration processing as expected if it would be
      the collisional relics of larger bodies) that the
      nucleus could be primordial (Davidsson et al.,
      DPS, 2015), and not a collisional rubble piles of
      a large body (Morbidelli and Rickman A&A,
      2015)”.

      Initial works on ‘pebble-ology’. From François Poulet et al.
      IAS/FR.

  • ianw16 says:

    I’ve uploaded a composite picture of what I believe to be the area of the 29 July outburst: http://www.imagebam.com/image/15b30d463231760

    The ‘before’ image is the one posted in the blog from 11 August 2015. The ‘after’ image is an OSIRIS NAC image, here: https://planetgate.mps.mpg.de/Image_of_the_Day/public/OSIRIS_IofD_2016-01-31.html.

    I believe the region is also visible in this image:
    https://planetgate.mps.mpg.de/Image_of_the_Day/public/OSIRIS_IofD_2016-01-26.html
    And also here:
    https://planetgate.mps.mpg.de/Image_of_the_Day/public/OSIRIS_IofD_2016-02-03.html

    Nothing overly obvious to my eyes, wonder what others think.

    • logan says:

      Nop 😉

    • logan says:

      And that’s exactly the point, Ianw16. The ‘bag’ containing the former outburst effluvium should be below those ‘small’ pores at surface. On thinking in this path I’m going for a totally thermodynamic scenario. [Don’t want to call them ‘chambers’, at this time].

    • logan says:

      Got to spark my old neurons: An [internal?] deepening of a pre-existing fail exposes new CO, CO2 ices’ surfaces and start the outburst. On sublimation continuing, cooling of these new surfaces slows and eventually average it.

      Like the proposal a lot , Yu.V. Skorov, L. Rezac, P. Hartogh et al. proposal. Also explain the lack of relevant variance in water production [at outbursts] 🙂

      So on progressively warming, Ducky is literally ‘breaking’ inside. Are those ‘breaks’ having the time to heal, in her 6y orbit?

      “…The authors of the last article concluded that “cometary grains formed at low-temperature conditions below ~30 Kelvin…” Pebble-ology.

      On having the time window, those cracks could be healed with higher temp, water ices.

      • logan says:

        Extremely relevant to this model is how heat is transfered from layer to layer…

      • logan says:

        This model is a little fragile at explaining neck persistence.

  • ianw16 says:

    In addition to what I wrote above, I’ve just found this abstract from a poster at the 47th Lunar and Planetary Science Conference: http://www.hou.usra.edu/meetings/lpsc2016/pdf/1901.pdf

    The main absract booklet, with links, is here:
    http://www.hou.usra.edu/meetings/lpsc2016/pdf/program.pdf

    • logan says:

      Like it a lot more than past paper, but triggering mechanism I don’t understand.

  • logan says:

    Could be seen a magnetic cavity as a ‘magnetic penumbra’?

  • logan says:

    Not knowing orbital mechanics wander if a speculation of mine presented before, that a brown star [or big rogue planet] on a hyperbolic orbit around Sun could exchange -trough a gravitational temporal channel- low orbital energy satellites.

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