[meteorite-list] 2004 MN4 size estimate

[Matson, Robert]

Hi Stan and List,

> according to the link i posted earlier the explosive yield of an impact
> would be equivalent to about 1.4 gigatons

This estimate is based on a guess for the object's reflectivity.  If it's
especially dark, the mass and thus energy could be quite a bit greater.
Hopefully Arecibo (or Goldstone) is planning to ping it soon while it's
still near its current close approach.

--Rob