Asteroid hits Earth

Discussion in 'science, nature and environment' started by 2hats, Jun 4, 2018.

  1. 2hats

    2hats

    On Saturday morning just (2nd June), around breakfast time, the NASA Catalina Sky Survey spotted an incoming asteroid (designated 2018LA) at about the distance of the Moon.
    [​IMG]
    Early calculations indicated it was on an Earth impacting trajectory (only the third time one has ever been spotted just prior to impact).
    [​IMG]
    Sure enough it re-entered and exploded over Botswana around 1644UT Saturday (some 8 hours after first observation):

    (video observation at location of yellow cross-hairs in previous image).

    The (approx.) 2m diameter asteroid exploded with an estimated yield of 0.3 to 0.5 kilotons of TNT, CTBTO infrasound monitoring confirming both the yield, location and time.
    [​IMG]
     
    Last edited: Jun 4, 2018
    elmpp, teqniq, Voley and 18 others like this.
  2. High Voltage

    High Voltage In the top 97% of Urban's most interesting posters

    I KNEW I'd heard something
     
    Celyn and PippinTook like this.
  3. Don Troooomp

    Don Troooomp Condescension and embedded self importance

    We argue about a garden fence or a tree blocking out the sunlight, then .....
    Perhaps we should all learn to be nice because any moment could see a fucking big rock landing on our heads.
     
    Poi E and editor like this.
  4. agricola

    agricola a genuine importer of owls

    2m diameter and half a kiloton?

    Half a kiloton:



    :eek:
     
    fishfinger and High Voltage like this.
  5. 2hats

    2hats

    2.6-3.8m diameter according to most recent estimates. Mass about 25-35 tonnes. Velocity something like 17km/s. That’s around 4*10^12 J (up to a kiloton of TNT). Latest evaluation puts the main breakup event at 0.3-0.5kT.
     

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