https://gregladen.com/blog/2007/12/18/tunguska-modeled-theres-good-n/ Tue, 18 Dec 2007 16:33:22 +0000 hourly 1 https://wordpress.org/?v=6.4.6 https://gregladen.com/blog/2007/12/18/tunguska-modeled-theres-good-n/#comment-2004 Tue, 18 Dec 2007 16:33:22 +0000 http://scienceblogs.com/gregladen/2007/12/18/tunguska-modeled-theres-good-n/#comment-2004 So, how big was it?3-5 Megatons is like 10-20 PJ of energy… http://en.wikipedia.org/wiki/Megatonasteroid & comet velocities are from 17-51km/s http://www.lpl.arizona.edu/impacteffects/E=1/2mv^2 -> m=2E/v^2 gives us:10-20 PJ for an 17km/s asteroid gives us 87-144 Gg mass10-20 PJ for an 51km/s comet gives us a 9.6-16 Gg massWith iron at 7.87 g/cc : http://www.coolmagnetman.com/magconda.htm…this is a range of 1200-18000 m^3, or a ball of iron 13-32m in diameter, assuming the spherical cow and everything.

]]> https://gregladen.com/blog/2007/12/18/tunguska-modeled-theres-good-n/#comment-2003 Tue, 18 Dec 2007 15:59:39 +0000 http://scienceblogs.com/gregladen/2007/12/18/tunguska-modeled-theres-good-n/#comment-2003 It’s nice they are gathering more data on Tunguska. I know it has been a cause for controversy and speculation since it’s big bang. The good news and the bad news being the same news is a new twist! LOL!Dave Briggs :~)

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