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Lunar impact

Discussion in 'Fred's House of Pancakes' started by bwilson4web, Mar 4, 2022.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Source: Mystery Rocket Will Crash Into The Moon Tomorrow, And Scientists Are Watching Closely

    On 4 March 2022, a . . . spent rocket booster will smack into the surface of the Moon at nearly 6,000 mph (9,656 km/h).​

    Per Wiki:

    On the Moon The Moon's gravity 2.38 km/hr (escape velocity)​

    This ratio, 9,656 km/h impact vs 2.38 km/hr, suggests there may be ejected material leaving the moon and headed to earth. Did I get my sums wrong?

    Bob Wilson
     
    #1 bwilson4web, Mar 4, 2022
  2. bat4255

    bat4255 2017 Prius v #2 and 2008 Gen II #2

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    I think it's supposed to be 2.38 km/sec not km/hr.

    Location Relative to Ve (km/s)[12] Location Relative to Ve (km/s)[12] System escape, Vte (km/s)
    On the Sun The Sun's gravity 617.5
    On Mercury Mercury's gravity 4.25 At Mercury The Sun's gravity ~ 67.7 ~ 20.3
    On Venus Venus's gravity 10.36 At Venus The Sun's gravity 49.5 17.8
    On Earth Earth's gravity 11.186 At Earth The Sun's gravity 42.1 16.6
    On the Moon The Moon's gravity 2.38 At the Moon The Earth's gravity 1.4 2.42
    On Mars Mars' gravity 5.03 At Mars The Sun's gravity 34.1 11.2
    On Ceres Ceres's gra
     
    #2 bat4255, Mar 4, 2022
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  3. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    Either way, I'm thinking that any ejecta won't make it all the way back home, and the builder equipped this rock with a dust filter.
     
    #3 ETC(SS), Mar 4, 2022
  4. fuzzy1

    fuzzy1 Senior Member

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    No. Either you misread "s" for "hr", or someone edited it between the time you looked, and the time I looked:

    upload_2022-3-4_8-11-34.png
     
    #4 fuzzy1, Mar 4, 2022
  5. bisco

    bisco cookie crumbler

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    i hope there isn't any damage to the underground cities
     
    #5 bisco, Mar 4, 2022
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  6. bwilson4web

    bwilson4web BMW i3 and Model 3

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    If it should spew debris that reaches earth, it would be great meteor shower.

    Bob Wilson
     
    #6 bwilson4web, Mar 4, 2022
  7. tochatihu

    tochatihu Senior Member

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    meteor shower = dust filter, from 2 comments above. It is an unusual type of dust filter though. Highly effective for particles below 1 cm. As size increases beyond that it gets more and more leaky. For most dust filters, performance vs. particle size runs the other way.

    ==
    Apparently LRO is out of place to see this impact. Or to have seen it. Did it already happen?
     
    #7 tochatihu, Mar 4, 2022
  8. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    That's why it's not a ROCK filter. ;)
     
    #8 ETC(SS), Mar 4, 2022
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