(meteorobs) Earth-grazer definition question

[LEO STACHOWICZ]

I'm afraid I can't answer, but I do have a related question that has been on my mind: For the purposes of observation, if we are talking about sporadics (or if the shower is unknown), how many degrees of sky does a meteor have to travel before it can be called an earth-grazer? Also, in the case of a known shower member, how far from the radiant does the meteor have to start to be called an earth-grazer?
Clear skies,Leo
 


    On Thursday, 19 November 2015, 23:21, Thomas Ashcraft <ashcraft at heliotown.com> wrote:
 

   Definition of an earth-grazing fireball from wiki:
 https://en.wikipedia.org/wiki/Earth-grazing_fireball
 
 " An Earth-grazing fireball (or Earth-grazer)[2] is a fireball, a very bright meteor that enters Earth’s atmosphere and leaves again."
 
 Does an earth-grazer have to leave earth's atmosphere to be called an earth-grazer?  Can it skim and ablate or burn up entirely and still be termed an earth-grazer?
 
 Thanks in advance.
 
 Thomas
 
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