Comet brushes Mars today; Once in a million year event.

Discussion in 'Fred's House of Pancakes' started by Onager, Oct 19, 2014.

  1. Onager

    Onager Junior Member

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    Burna J likes this.
  2. bisco

    bisco cookie crumbler

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    i don't see anything.
     
  3. Onager

    Onager Junior Member

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    It started at 11:45 EST . . . here are some videos.







     
  4. GrumpyCabbie

    GrumpyCabbie Senior Member

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    I think with these sorts of things it's better to wait a week or two and let them analise the data before releasing it in a more interesting way. I like Mars and space exploration but the above videos have left me underwhelmed. Sorry.
     
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  5. Onager

    Onager Junior Member

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    Can't wait to see the planet side view. NASA moved all the satellites to the opposite side of the Mars so that the Kibbles and Bits from the comet don't damage them. Don't ask me how that works.
     
  6. bisco

    bisco cookie crumbler

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    yes, seems more scientific than visual. i was hoping for a good collision.:cool:
     
  7. tochatihu

    tochatihu Senior Member

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    One visualization I would like to see is how the comet would appear by eye from the Martian surface. Phil Plaitt said it would cover 7 degrees which is not ignorable if it was brightly lit. But for how long would it have been big in the sky? Two minutes like ISS? A hour?

    Fifty km/sec at 150,000 km range. We should be able to figure this out.
     
  8. Onager

    Onager Junior Member

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    I have to drop my trousers if I count over 20, you don't even want to visualize that!


    Comet Siding Spring Grazes Mars' Atmosphere (VIDEO)
     
  9. wjtracy

    wjtracy Senior Member

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    I was going to get my scope out, but they said the comet was 12th magnitude which I am lucky to see dimmer than 5th magitude around here., but 12 forget it.
     
  10. Onager

    Onager Junior Member

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    Waiting for the NASA pics from Hubble is there any chance they decided not to point towards this event?

    Real?
    [​IMG]

    NASA`s fleet of Mars-orbiting satellites and robots on the planet`s surface were primed for the flyby, hoping to capture the rare event and collect a trove of data for Earthlings to study.

    Comet Siding Spring whizzes past Mars | Zee News
     
  11. bisco

    bisco cookie crumbler

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    that's pretty sweet. reminds me of buck whatsisname.
     
  12. Onager

    Onager Junior Member

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  13. fuzzy1

    fuzzy1 Senior Member

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    No.

    The landscape and atmospheric haze indicate a daylight picture. The purported 'comet' tail is suggesting that the sun is below the horizon, i.e. a nighttime picture.

    The 'comet' also looks far more like an artist's impression of a meteoric fireball than of an actual comet.
     
  14. hkmb

    hkmb Active Member

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    I think this one's real. It's a picture of a Comet viewed from Mars.

    comet.jpg
     
  15. wjtracy

    wjtracy Senior Member

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    Sounds like this event was over-hyped...I see no pictures on-line.

    But we got a partial solar eclipse Oct 23 in North America, and meteor shower the same day from Halley's Comet. So look up!
     
  16. fuzzy1

    fuzzy1 Senior Member

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    Some images are now online, but they are quite unimpressive compared to the mock-up image back at post #10. BTW, I found that image used in a post from Feb 27, 1013: New data concerning the close approach of comet C/2013 A1 to Mars.

    Actual pictures in these posts:
    (from Mars Reconnaissance Orbiter) Mars-Bound Comet: Photos of Comet C/2013 A1 Siding Spring (Gallery)
    (from Opportunity rover): Mars and Siding Spring: Photo gallery.
    Opportunity Rover Spots Comet Siding Spring from the Surface of Mars!
    NASA Rover Opportunity Views Comet Near Mars | NASA
     
  17. hkmb

    hkmb Active Member

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    14, surely?
     
  18. tochatihu

    tochatihu Senior Member

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    last link in #16 has Opportunity Panoramic camera showing cosmic rays. Cosmic rays. Pretty amazing what happens in 0.006 of an atmosphere. (and a weak planetary magnetic field)
     
    #18 tochatihu, Oct 21, 2014
    Last edited: Oct 21, 2014
  19. fuzzy1

    fuzzy1 Senior Member

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    While that one initially appears the most impressive, I'm leaving it as 'undetermined'. But I have a suspicion that the Comet's service ceiling isn't high enough to operate in Mars' thin atmosphere. :)
     
  20. hkmb

    hkmb Active Member

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    With the pre-1958 ones, that would certainly be a problem: those square windows couldn't deal with the pressure differences inherent in interplanetary travel, and we'd have seen the traditional Comet 1 wings-falling-off problem. But the Comet 2 with the round windows would probably be OK. The poor resolution from the Curiosity camera makes it hard to tell which kind it is.
     
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