[Az-Geocaching] GPS cell phones

[Joe Brekke]

> BTW, did you hear about asteroid 2004 MN4?  It's a 400 meter sized
asteroid
> that over the weekend was estimated to have an impact probability on the
> future date of April 13, 2029 that started at 1 in 300 and rose to 1 in 38
> before our group found some prediscovery images that improved the orbit
> enough to show that impact would definitely not happen - at least not on
> April 13, 2029....  Doomsday averted again!  Actually, a 400 meter
asteroid
> would make a real mess, but only if it hit very close to you would it
spell
> your doom....
>
> Jim.
>

Very interesting!  So if it's not going to impact, just how close will it
come?