"Super Comet: After the Impact" -- What did you think?

[MeteorWayne]

Asteroids don't travel at thousands of km/sec. The atmospheric entry velocity is between 11.2 and 72.3 km/sec (assuming it's part of the solar system) and since almost all asteroids revolve around the sun the same way as earth, typical values are 15- 40 km/sec. Usually only Oort cloud or Halley type comets approach from the opposite direction and can hit the high end of that speed range. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[astroguard]

<b>MeteorWayne<b> wrote:<br /> <br /><i># he is indeed correct, the impact effects<br /># would be minimal at 100 km.</i><br /> <br />If one includes life-threatening radiation burns as one of the [many] impact effects, then he is <i>"indeed"</i> wrong. State what you mean, Wayne.</b></b>

 

[yevaud]

In a strict collision (impact) event, there would be few if any radiation effects.<br /><br />FYI. <div class="Discussion_UserSignature"> <p><em>Differential Diagnosis:  </em>"<strong><em>I am both amused and annoyed that you think I should be less stubborn than you are</em></strong>."<br /> </p> </div>

 

[MeteorWayne]

Are you implying something other than thermal radiation?<br /><br />What kind of "life threatening radiation" are you talking about?<br />There are none, and no reason I know of to supect there would be any. <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[qzzq]

Unless the asteroid obliterates a nuclear facility of some kind of course. <img src="/images/icons/wink.gif" /> <div class="Discussion_UserSignature"> <p> </p><p>***</p> </div>

 

[nexium]

If Yevaud is correct, then dirty nuclear blasts are not comparable to small comet hits. I'm quite sure some ultra-violet is produced as well infrared and visable light. Are we quite sure negligible Xrary and gamma even at collisions at 72.3 kilometers per second? plasma is produced by high speed impacts. Neil

 

[yevaud]

It requires one hell of an impact (impact energies, you see) to liberate any radioactivity at all. At truly enormous impact velocities, true, there will be X-Rays and Gammas, but that's far in excess of any velocities we've been discussing. <div class="Discussion_UserSignature"> <p><em>Differential Diagnosis:  </em>"<strong><em>I am both amused and annoyed that you think I should be less stubborn than you are</em></strong>."<br /> </p> </div>