(meteorobs) RE: Origin of ZHR is elusive

drobnock drobnock at penn.com
Sun May 20 16:07:08 EDT 2007


Hi
Although English is the current language under discussion,  in the
period of time the term "zenith hourly rate'  (zhr) was derived,  it may
not have been call the ZHR. If it's origins are French, or German, or
other language, it is possible then the term may just be the English
translation of another language.

And at some point in time the term "zenith hourly rate" became the
accepted standard.

The mathematics to derive the term would be the same in all languages.
Yes?

(The formula is: ZHR = 1/sin L * R^(6.5 - m) * b * n.
where:
L = the height of the shower center on the sky
R = a special value for each meteor shower
m = the limiting magnitude
b = a number that depends on how many that observed
n = number of meteors seen in an hour )

Just labeled differently?

Any thoughts?

George John Drobnock







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