(meteorobs) Nice variety of Fireballs occured.

[Ed Majden]

On 6-Oct-07, at 5:03 PM, Chris Peterson wrote:

> Hi Ed-
>
> My own modeling work. There seems to be no lower bound on brightness- 
> slow, several centimeter objects on very shallow trajectories 
> experience gradual deceleration high in the atmosphere, and can 
> probably survive to the ground without generating any visible light. 
> The mag -6 value you suggest may be referring to more typical 
> meteorite generating cases, but I don't think it can be offered as an 
> absolute limit.
>
> Chris
>
> *****************************************
> Chris L Peterson
> Cloudbait Observatory
> http://www.cloudbait.com
>
>
Hi Chris:
	I don't think the -6.0 magnitude value was intended as an absolute 
limit but a probable value.  Your modeling work sounds rather 
interesting.  Have you published a paper on it yet or submitted it for 
pier review?  If so, could you send me a pre-print?  On second thought, 
I suspect the math would be well above my capabilities!   As I 
understand it, the minimum entry velocity for a meteoroid is escape 
velocity.  Wouldn't this result in ablation even for a short period of 
time?
Ed